Bug 59810 - [IVB] triple display issue
Summary: [IVB] triple display issue
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: highest critical
Assignee: Jesse Barnes
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-01-24 16:00 UTC by Terence
Modified: 2016-10-07 05:39 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
dmesg and DRI log (231.49 KB, application/x-zip)
2013-01-24 16:00 UTC, Terence
no flags Details
system log (145.89 KB, application/x-zip)
2013-01-31 01:16 UTC, Terence
no flags Details
log of just enable two screens on CRTC 0 (DP1) and CRTC 1 (DP3). (33.62 KB, application/x-zip)
2013-02-04 15:18 UTC, Terence
no flags Details
hotplug_3.8.5 (323.05 KB, text/plain)
2013-04-09 14:27 UTC, Terence
no flags Details
Xorg-restart_3.8.5 (233.81 KB, text/plain)
2013-04-09 14:27 UTC, Terence
no flags Details
for comment 27-kernel-3.8.5.cfg (92.85 KB, text/plain)
2013-04-25 08:10 UTC, Terence
no flags Details
for comment 27-startx.sh (1.28 KB, text/plain)
2013-04-25 08:10 UTC, Terence
no flags Details
for comment 27-xorg.conf (5.39 KB, text/plain)
2013-04-25 08:11 UTC, Terence
no flags Details
fix up pch pll handling on ivb (1.11 KB, patch)
2013-05-26 17:05 UTC, Daniel Vetter
no flags Details | Splinter Review
fix up pch pll handling on ivb v2 (3.17 KB, patch)
2013-05-26 18:50 UTC, Daniel Vetter
no flags Details | Splinter Review
output of running startx.sh (2.73 KB, text/plain)
2013-05-28 02:52 UTC, shui yangwei
no flags Details

Description Terence 2013-01-24 16:00:11 UTC
Created attachment 73589 [details]
dmesg and DRI log

triple display issue on IvyBridge platform ( i5-3470T + Q77 ).
While xorg configured as 1920x1080@60Hz x 3, Ivy bridge platform randomly can't bring up DP3/HDMI2 port and the  fail-rate is about 50%.

Tried following Linux distribution:
* Yocto 1.3 x86_64 with IvyBridge BSP.  (Kernel 3.4.11)
* Ubuntu 12.10 x86_64 with intellinuxgraphic 12Q4 driver. (Kernel 3.6.5)

Increased the logbuffer size with log_buf_len=4M but it seems like i915 kernel module will clear dmesg.
dump dmesg between every time when start/stop xorg.  
The 6th time I stopped xorg, DP1 port failed to display in text mode.
Please see attached file "dmesg.12.log" and files in "DRI_LOG_dmesg.12.log".

Then 7th time I start xorg, DP1 still not display any signal.
Please see attached file "dmesg.13.log" and files in "DRI_LOG_dmesg.13.log".

Then 8th time I stopped xorg, DP1 came back in text mode.
Please see attached file "dmesg.14.log" and files in "DRI_LOG_dmesg.14.log".
Comment 1 Daniel Vetter 2013-01-24 16:04:26 UTC
A few questions:

- Does this still happen on latest drm-intel-nightly from http://cgit.freedesktop.org/~danvet/drm-intel ?

- Does this only happen when you try to light up a 3-pipe configuration, or can it also happen when only using a single display (but with the same physical configuration)? You might want to set up a scripted loop with xrandr to enable/disable the screen a few times. Would be rather interesting if this changes the failure rate.

If you do the single-screen configuration stress-testing, please make sure that you select the same crtc as with the 3 pipe configuration. You can see the crtc of a given config with

xrandr --verbose

and set it with --crtc <num>
Comment 2 Terence 2013-01-31 01:16:08 UTC
Created attachment 73969 [details]
system log
Comment 3 Terence 2013-01-31 01:16:39 UTC
1.We've tried latest drm-intel-nightly(1/29/2013) kernel but problem persist, please see attachment for detail.

2.We use same configuration with single display and it's working fine.
seems this problem just only happen on condition that 2 or more monitors connecting to the M/B.

Single Display in port DP3  20/20 (pass times/test count) 100% pass
Single Display in port DP1  20/20 (pass times / test count) 100% pass
Single Display in port HDMI2  20/20 (pass times / test count) 100% pass
(The test record ( include `xrandr --verbose` result) has been attached to the attachment.)
Comment 4 Daniel Vetter 2013-01-31 08:44:09 UTC
Hm, somewhat unexpected that single pipe works, but things start to fail as soon as you enable two screens. Just to clarify: Even when you only enable two screens on CRTC 0 and CRTC 1 you experience modeset failures? CRTC 2 is a bit special, hence why I'm asking ...
Comment 5 Terence 2013-02-04 15:14:22 UTC
Yes, The problem persist even when we just enable two screens on CRTC 0 (DP1) and  CRTC 1 (DP3).
Comment 6 Terence 2013-02-04 15:18:28 UTC
Created attachment 74179 [details]
log of just enable two screens on CRTC 0 (DP1) and  CRTC 1 (DP3).
Comment 7 Terence 2013-03-04 20:48:24 UTC
Do you know more information about this bug? Can you reproduce this in your side?
Comment 8 Daniel Vetter 2013-03-04 22:59:47 UTC
Comment on attachment 74179 [details]
log of just enable two screens on CRTC 0 (DP1) and  CRTC 1 (DP3).

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Comment 9 Terence 2013-03-04 23:01:21 UTC
Dear Sender,
I am out of office for business trip. Please excuse the delayed response. I will response back once I get connected. For urgent matter, please reach me at +886-963-362-013.  Or your can reach my manager, Mahesh (mahesh.bhan@intel.com) for further help. Thanks.

Regards,
-Terence
Comment 10 Terence 2013-03-05 06:15:31 UTC
(In reply to comment #8)
Daniel,
I cannot read on your comment. Can you double check?

> Comment on attachment 74179 [details]
> log of just enable two screens on CRTC 0 (DP1) and  CRTC 1 (DP3).
> 
> >PK�����c1:������������7���fail_DP3_DP1_portrait_h_clone_DrmIntel_GIP01292013/bufsPK����c1:×z 7���I���:���fail_DP3_DP1_portrait_h_clone_DrmIntel_GIP01292013/clientsKTHI-ã,ÈLQ�ÒÌÎÜÄôÌdNÌüäb.®J ¸¡¥%H	
> 0¦±¹
> �PK����c1:
Comment 11 Daniel Vetter 2013-03-05 08:32:51 UTC
On Tue, Mar 5, 2013 at 7:15 AM,  <bugzilla-daemon@freedesktop.org> wrote:
> --- Comment #10 from Terence <terence.chiang@intel.com> ---
> (In reply to comment #8)
> Daniel,
> I cannot read on your comment. Can you double check?

Oh, I've only hit the wrong button when trying to fix up the mimetypes
of your attachments, which resulted in the zip being pasted as a
comment.
Comment 12 Terence 2013-03-07 23:56:16 UTC
(In reply to comment #11)
Any Update on this or you need more information on this bug? this becomes a major bug now.

> On Tue, Mar 5, 2013 at 7:15 AM,  <bugzilla-daemon@freedesktop.org> wrote:
>
> --- Comment #10 from Terence <terence.chiang@intel.com> ---
> (In reply to
> comment #8)
> Daniel,
> I cannot read on your comment. Can you double check?
> Oh, I've only hit the wrong button when trying to fix up the mimetypes
of
> your attachments, which resulted in the zip being pasted as a
comment.
Comment 13 Terence 2013-03-19 10:13:40 UTC
Do you need more information regarding this issue? This impact the prodcut schedule. thanks.
Comment 14 Jesse Barnes 2013-03-25 18:00:49 UTC
Hm, on my IVB, dual head always comes up (DVI + DP).  Would it be possible for you to send me one of the failing machines so I can debug it?
Comment 15 Jesse Barnes 2013-03-28 18:45:02 UTC
While I'm waiting for my system, you could try this patch.  In the unlikely event we're training successfully for pattern 1 and 2 but with different vswing and preemphasis settings.

http://lists.freedesktop.org/archives/intel-gfx/2013-March/026246.html
Comment 16 Terence 2013-04-02 13:04:44 UTC
Tried the patch and it is still failed.
But we found that Ubuntu 13.04 /w Kernel 3.8.0-13-generic x86_64 seems solve this issue. But we need run more test cases on that.

(In reply to comment #15)
> While I'm waiting for my system, you could try this patch.  In the unlikely
> event we're training successfully for pattern 1 and 2 but with different
> vswing and preemphasis settings.
> 
> http://lists.freedesktop.org/archives/intel-gfx/2013-March/026246.html
Comment 17 Daniel Vetter 2013-04-02 13:54:53 UTC
Can you please test whether plain 3.8 and latest 3.9-rc also work or not?
Comment 18 Terence 2013-04-02 14:43:53 UTC
you mean the 3.8.5 (stable) and 3.9-rc5 (mainline) from kernel.org? 

(In reply to comment #17)
> Can you please test whether plain 3.8 and latest 3.9-rc also work or not?
Comment 19 Daniel Vetter 2013-04-02 15:25:42 UTC
(In reply to comment #18)
> you mean the 3.8.5 (stable) and 3.9-rc5 (mainline) from kernel.org? 

Yep
Comment 20 Terence 2013-04-09 14:26:16 UTC
tried build kernel version 3.8.5 with Xorg V1.11.3. This issue is still unsolved. 
1. Monitor will disappear whil unplug then plug in DP or DVI cable.
please see hotplug_3.8.5_test.zip log . ( loop0 is pass , loop1~3 are failed)

2.re-start Xorg test.
please see Xorg-restart_3.8.5_test.zip log. ( loop5 is pass , loop6~8 are failed)
Comment 21 Terence 2013-04-09 14:27:17 UTC
Created attachment 77670 [details]
hotplug_3.8.5
Comment 22 Terence 2013-04-09 14:27:58 UTC
Created attachment 77671 [details]
Xorg-restart_3.8.5
Comment 23 Jesse Barnes 2013-04-22 16:45:04 UTC
I have the test platform now, and haven't seen this with DP + DVI, looping through startup and shutdown of X.

Does it need to be a dual DP config to reproduce the failure?

I'm using drm-intel-next:

commit 80ad9206c0d863832bc5f6008c4d1868d1df8e70
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Apr 19 14:36:51 2013 +0300

    drm/i915: Make struct dpll == intel_clock_t
Comment 24 Terence 2013-04-23 03:26:12 UTC
(In reply to comment #23)

Dual display port monitor are necessary to reproduce the failure.

> I have the test platform now, and haven't seen this with DP + DVI, looping
> through startup and shutdown of X.
> 
> Does it need to be a dual DP config to reproduce the failure?
> 
> I'm using drm-intel-next:
> 
> commit 80ad9206c0d863832bc5f6008c4d1868d1df8e70
> Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Date:   Fri Apr 19 14:36:51 2013 +0300
> 
>     drm/i915: Make struct dpll == intel_clock_t
Comment 25 Jesse Barnes 2013-04-23 20:09:37 UTC
Ok I reproduced the issue after a few restarts of lightdm with 2 DP monitors plugged in (25x16 + 19x12).  This patch seems to fix it though:

https://bugs.freedesktop.org/attachment.cgi?id=78330&action=edit

Can you confirm?
Comment 26 Jesse Barnes 2013-04-23 20:18:30 UTC
Actually can you test this one to be sure?

http://lists.freedesktop.org/archives/intel-gfx/2013-April/027102.html
Comment 27 Terence 2013-04-25 08:08:04 UTC
After trying comment 25 and 26. The issue is still remain. 

here is the steps to configure the environment:
system configuration
 
CPU:Intel® Core™ i5-3470 Processor
Kernel: 3.8.5
libdrm :libdrm-2.4.42
2D driver : xf86-video-intel-2.21.6
 
How to reproduce this problem:
1. use the attached config "kernel-3.8.5" to build kernel image and driver modules.
2. Restart our system and then install i915 driver by "modprobe" without any parameters before running Xorg.
3. make sure the "i915" "drm_kms_helper" are installed. 
4. try the command line below to start up Xorg or stop Xorg.( please see the attached files xorg.conf and test script startx.sh for deatil.)
sh -x ./startx.sh start ( it will start up Xorg )
sh -x ./start.sh stop ( it will stop Xorg )
Comment 28 Terence 2013-04-25 08:10:06 UTC
Created attachment 78445 [details]
for comment 27-kernel-3.8.5.cfg
Comment 29 Terence 2013-04-25 08:10:39 UTC
Created attachment 78446 [details]
for comment 27-startx.sh
Comment 30 Terence 2013-04-25 08:11:07 UTC
Created attachment 78447 [details]
for comment 27-xorg.conf
Comment 31 Jesse Barnes 2013-04-25 20:22:16 UTC
Testing here with Ville's patch and I don't see the issue, even with your scripts.

I'm using Ubuntu 12.04 bits with a drm-intel-next-queued kernel from yesterday with Ville's patch on top.  Maybe some fixes are required after 3.8.5 in addition to the one from Ville?

I'm at 8 start/stop iterations so far, I'll post again later after trying some more.
Comment 32 Jesse Barnes 2013-04-25 21:13:25 UTC
I got up to 142 iterations and didn't see any failures like the ones you described.  Two times my large Dell monitor sync'd improperly at first but then re-sync'd and the image was correct.  I think it did the same thing a couple of times when going back to text mode, but I couldn't see the corruption because the screen was mostly black.  But that never happened on DP1, which is a smaller Dell monitor in my config.

Terence, can you re-test with the -nightly branch and Ville's patch?
Comment 33 Terence 2013-04-26 05:45:40 UTC
will try with latest nightly branch and get back to you.
 
Aslo for your system, which release of Ubuntu 12.04 that you are using? 64 bit or 32bit? and your kernel and Xorg verion? thanks.
Comment 34 Jesse Barnes 2013-04-26 16:07:07 UTC
Ubuntu 12.04.1, 64-bit.

X server 1.11.3, X driver 2.17.0, but I don't think those are relevant.  For this test, the kernel version is the only thing that should matter.
Comment 35 Terence 2013-04-30 09:59:39 UTC
which kernel that do you use? 3.8.10 (stable)?
Comment 36 Jesse Barnes 2013-04-30 14:43:37 UTC
> which kernel that do you use? 3.8.10 (stable)?

No, drm-intel-next-queued from
git://people.freedesktop.org/~danvet/drm-intel.git
Comment 37 Daniel Vetter 2013-04-30 15:07:38 UTC
drm-intel-nightly is the branch which also contains the bugfix.
Comment 38 Terence 2013-04-30 23:54:24 UTC
I still have issue on my side.
from a readme document: "On this development branch, it is necessary to use i915.preliminary_hw_support=1 at Linux Kernel command line to enable Haswell and ValleyView Support. Note: don't use this option unless you are using the drm-intel-nightly branch or a Kernel version newer than 3.7-rc3" Do I need to apply i915.preliminary_hw_support=1?

Aslo please let me know how to reproduce your testing envirnment, is that:
1. install the ubuntu 12.04 32bit
2. use drm-intel-next-queued kernel from git://people.freedesktop.org/~danvet/drm-intel.git 
3. apply Ville's patch from http://lists.freedesktop.org/archives/intel-gfx/2013-April/027102.html 

Please help on this. thanks.
Comment 39 Jesse Barnes 2013-05-01 00:21:52 UTC
On Tue, 30 Apr 2013 23:54:24 +0000
bugzilla-daemon@freedesktop.org wrote:

> https://bugs.freedesktop.org/show_bug.cgi?id=59810
> 
> --- Comment #38 from Terence <terence.chiang@intel.com> ---
> I still have issue on my side.
> from a readme document: "On this development branch, it is necessary to use
> i915.preliminary_hw_support=1 at Linux Kernel command line to enable Haswell
> and ValleyView Support. Note: don't use this option unless you are using the
> drm-intel-nightly branch or a Kernel version newer than 3.7-rc3" Do I need to
> apply i915.preliminary_hw_support=1?
> 
> Aslo please let me know how to reproduce your testing envirnment, is that:
> 1. install the ubuntu 12.04 32bit
> 2. use drm-intel-next-queued kernel from
> git://people.freedesktop.org/~danvet/drm-intel.git 
> 3. apply Ville's patch from
> http://lists.freedesktop.org/archives/intel-gfx/2013-April/027102.html 

You can use the drm-intel-nightly branch, it includes the fix already.
Comment 40 Terence 2013-05-06 02:10:57 UTC
Tried using the "nightly drm-intel branch" as below but problem persist.
drm-intel-night branch info:
author	Daniel Vetter <daniel.vetter@ffwll.ch>
2013-05-01 19:18:39 (GMT)
committer	Daniel Vetter <daniel.vetter@ffwll.ch>
2013-05-01 19:18:39 (GMT)
commit	118e24772256e9f92d4e569d37c25bd28692774d (patch) (side-by-side diff)

We have compiled last drm-intel linux kernel as .deb file.
Appreciated if you could try to install that on your pure ubuntu 12.04 64bit OS to duplicate same environment as we have. 
so we can work faster with efficiency.

Nightly Drm-intel branch source:
https://dl.dropboxusercontent.com/u/17703673/triple-test/drm-intel-drm-intel-nightly.tar.gz
drm-intel branch linux kernel deb (headers):
https://dl.dropboxusercontent.com/u/17703673/triple-test/linux-headers-3.9.0-rc6_3.9.0-rc6-10.00.Custom_amd64.deb
drm-intel branch linux kernel deb (Image):
https://dl.dropboxusercontent.com/u/17703673/triple-test/linux-image-3.9.0-rc6_3.9.0-rc6-10.00.Custom_amd64.deb
Comment 41 shui yangwei 2013-05-14 06:26:09 UTC
Environment:
--------------------------------------
Genuine Intel(R) CPU  @ 2.20GHz

Kernel:
--------------------------------------
Kernel: (drm-intel-next-queued)f2799ab0a317ecde76161df5d3102aa6e0e2c9e4
Some additional commit info:
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Tue May 7 15:10:29 2013 +0300

    drm/i915: fix hotplug event bit tracking

xrandr --verbose:
--------------------------------------
DP1 connected 1920x1080+0+0 (0x48) normal (normal left inverted right x axis y a
xis) 477mm x 268mm
HDMI2 connected 1920x1080+0+0 (0x48) normal (normal left inverted right x axis y
 axis) 477mm x 268mm

Description:
--------------------------------------
I have tested our IvyBridge platform as comment 17 described steps, with latest -next-queued kernel, and we can't reproduce this issue, we also test one Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz machine, also worked well. We don't have IvyBridge platform ( i5-3470T + Q77 ) which Terence reported on.
Comment 42 Terence 2013-05-14 14:18:50 UTC
for this output of xrandr --verbose
do you connected to monitors? Does the screen bring up? Please also share us what model of montirs that you are testing.
Comment 43 shui yangwei 2013-05-15 08:23:19 UTC
(In reply to comment #42)
> for this output of xrandr --verbose
> do you connected to monitors? Does the screen bring up? Please also share us
> what model of montirs that you are testing.

I just paste connected pipe information here, of cause, our monitors are connected: DP1---- VE228Q-C   HDMI2----VE228Q-C.
Comment 44 Daniel Vetter 2013-05-26 17:05:51 UTC
Created attachment 79807 [details] [review]
fix up pch pll handling on ivb

This patch should fix a bug which could potentially lead to the issues you're seeing. Please test and if it still fails attach a full dmesg with drm.debug=0xe of the failing mode set sequence.
Comment 45 Daniel Vetter 2013-05-26 18:50:04 UTC
Created attachment 79813 [details] [review]
fix up pch pll handling on ivb v2

I've found another issue with the current logic.
Comment 46 shui yangwei 2013-05-27 10:00:38 UTC
Kernel Info:
-----------------
Kernel: (drm-intel-next-queued)fe816333293fb51edbbbf364f108f831b72664e0
Some additional commit info:
Author: Ben Widawsky <ben@bwidawsk.net>
Date:   Sat May 25 12:26:39 2013 -0700

    drm/i915: Call context fini at cleanup

HDW Info:
------------------
00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz

Description:
------------------
I test latest -next-queued kernel on the machine which Terence shipped to me, and I haven't reproduce this issue. I don't know if it is fixed like Daniel says, or it is my test steps slipped the issue. I list my testing steps below, and if there's anything need to do further, please comment, I'm glad to track it. 

Steps:
------------------
1. plugged in 1 DP and 1 DVI
2. make sure the "i915" "drm_kms_helper" are installed. 
3. sh -x ./startx.sh start ( xinit &)
   sh -x ./start.sh stop ( kill Xorg and xeyes )
4. loop running step 3 for 20 times

startx.sh:
------------------
#!/bin/bash
XSCREEN_CFG=Screen0
#XORG_CFG="/root/xorg/xorg.conf.portrait_h_ext_x3_1222"
#XORG_CFG="./xorg.conf.portrait_h_clone_x3_1222"
XORG_CFG="./xorg.conf"

if [ `mount | grep /sys/kernel/debug | wc -l` -eq 0 ];then
        echo "mount GPU debug log";
        sudo mount -t debugfs debugfs /sys/kernel/debug
fi

if [ "$1" == "start" ];then
        export DISPLAY=:0.0
        export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu:/lib/x86_64-linux-gnu
        export QTWEBKIT_PLUGIN_PATH=${FLASH_LIBS_PATH}
        export X11_PATH=/home/X11

        XORG_CONF_FILE=$DEFAULT_XORG_CONF_FILE
        echo "XORG_CONF_FILE:" $XORG_CONF_FILE

        xinit&

        sleep 2
        # workaround solution
        /usr/bin/amixer -c 0 sset Master,0 100%,100% unmute cap
        #compiz &
        #stop_plymouth
        xeyes -geometry 300x300+0+0 &
        xeyes -geometry 300x300+1000+0 &
        xeyes -geometry 300x300+2000+0 &
        xeyes -geometry 3000x1000+800+600 &

else if [ "$1" == "stop" ];then
        killall xeyes;
        killall compiz;
        killall Xorg;
fi
fi
Comment 47 Imre Deak 2013-05-27 12:10:11 UTC
(In reply to comment #46)
> Kernel Info:
> -----------------
> Kernel: (drm-intel-next-queued)fe816333293fb51edbbbf364f108f831b72664e0
> Some additional commit info:
> Author: Ben Widawsky <ben@bwidawsk.net>
> Date:   Sat May 25 12:26:39 2013 -0700
> 
>     drm/i915: Call context fini at cleanup
> 
> HDW Info:
> ------------------
> 00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
> Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
> 
> Description:
> ------------------
> I test latest -next-queued kernel on the machine which Terence shipped to
> me, and I haven't reproduce this issue. I don't know if it is fixed like
> Daniel says, or it is my test steps slipped the issue. I list my testing
> steps below, and if there's anything need to do further, please comment, I'm
> glad to track it. 
> 
> Steps:
> ------------------
> 1. plugged in 1 DP and 1 DVI

As far as I understood people managed to trigger the bug with two DP connections. Also a the combination of DP port + HDMI port to DP converter brings up the HDMI port as blank, but that might be a separate issue.
Comment 48 Yi Sun 2013-05-27 13:16:06 UTC
(In reply to comment #47)
> (In reply to comment #46)
> > Kernel Info:
> > -----------------
> > Kernel: (drm-intel-next-queued)fe816333293fb51edbbbf364f108f831b72664e0
> > Some additional commit info:
> > Author: Ben Widawsky <ben@bwidawsk.net>
> > Date:   Sat May 25 12:26:39 2013 -0700
> > 
> >     drm/i915: Call context fini at cleanup
> > 
> > HDW Info:
> > ------------------
> > 00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
> > Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
> > 
> > Description:
> > ------------------
> > I test latest -next-queued kernel on the machine which Terence shipped to
> > me, and I haven't reproduce this issue. I don't know if it is fixed like
> > Daniel says, or it is my test steps slipped the issue. I list my testing
> > steps below, and if there's anything need to do further, please comment, I'm
> > glad to track it. 
> > 
> > Steps:
> > ------------------
> > 1. plugged in 1 DP and 1 DVI
> 
> As far as I understood people managed to trigger the bug with two DP
> connections. Also a the combination of DP port + HDMI port to DP converter
> brings up the HDMI port as blank, but that might be a separate issue.

Hi Imre,
A little confused, that is there such converter which HDMI port to DP? If there's such converter, is it a active one?
Comment 49 Imre Deak 2013-05-27 13:26:20 UTC
(In reply to comment #48)
> (In reply to comment #47)
> > (In reply to comment #46)
> > > Kernel Info:
> > > -----------------
> > > Kernel: (drm-intel-next-queued)fe816333293fb51edbbbf364f108f831b72664e0
> > > Some additional commit info:
> > > Author: Ben Widawsky <ben@bwidawsk.net>
> > > Date:   Sat May 25 12:26:39 2013 -0700
> > > 
> > >     drm/i915: Call context fini at cleanup
> > > 
> > > HDW Info:
> > > ------------------
> > > 00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
> > > Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
> > > 
> > > Description:
> > > ------------------
> > > I test latest -next-queued kernel on the machine which Terence shipped to
> > > me, and I haven't reproduce this issue. I don't know if it is fixed like
> > > Daniel says, or it is my test steps slipped the issue. I list my testing
> > > steps below, and if there's anything need to do further, please comment, I'm
> > > glad to track it. 
> > > 
> > > Steps:
> > > ------------------
> > > 1. plugged in 1 DP and 1 DVI
> > 
> > As far as I understood people managed to trigger the bug with two DP
> > connections. Also a the combination of DP port + HDMI port to DP converter
> > brings up the HDMI port as blank, but that might be a separate issue.
> 
> Hi Imre,
> A little confused, that is there such converter which HDMI port to DP? If
> there's such converter, is it a active one?

There is, and I guess by definition it has to be active.
Comment 50 Yi Sun 2013-05-27 14:21:46 UTC
(In reply to comment #49)
> (In reply to comment #48)
> > (In reply to comment #47)
> > > (In reply to comment #46)
> > > > Kernel Info:
> > > > -----------------
> > > > Kernel: (drm-intel-next-queued)fe816333293fb51edbbbf364f108f831b72664e0
> > > > Some additional commit info:
> > > > Author: Ben Widawsky <ben@bwidawsk.net>
> > > > Date:   Sat May 25 12:26:39 2013 -0700
> > > > 
> > > >     drm/i915: Call context fini at cleanup
> > > > 
> > > > HDW Info:
> > > > ------------------
> > > > 00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)
> > > > Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
> > > > 
> > > > Description:
> > > > ------------------
> > > > I test latest -next-queued kernel on the machine which Terence shipped to
> > > > me, and I haven't reproduce this issue. I don't know if it is fixed like
> > > > Daniel says, or it is my test steps slipped the issue. I list my testing
> > > > steps below, and if there's anything need to do further, please comment, I'm
> > > > glad to track it. 
> > > > 
> > > > Steps:
> > > > ------------------
> > > > 1. plugged in 1 DP and 1 DVI
> > > 
> > > As far as I understood people managed to trigger the bug with two DP
> > > connections. Also a the combination of DP port + HDMI port to DP converter
> > > brings up the HDMI port as blank, but that might be a separate issue.
> > 
> > Hi Imre,
> > A little confused, that is there such converter which HDMI port to DP? If
> > there's such converter, is it a active one?
> 
> There is, and I guess by definition it has to be active.

Thanks Imre, that make sense.
Comment 51 shui yangwei 2013-05-28 02:52:57 UTC
Created attachment 79873 [details]
output of running startx.sh

I tried 2 DP case for more than 30 times by running the script of attachment 78446 [details](startx.sh), I also can't reproduce the issue like the bug described. I attached the output of running script: startx.sh. Please notice me whether I need to do anything else, or I need to setup something about our machine's environment.
Comment 52 shui yangwei 2013-06-13 05:41:14 UTC
By co-work with Terence and QNAP(one company of taiwan), we have been sure that this issue already gone on latest -next-queued kernel. I reproduced this issue by using QNAP's older kernel. Both loop running 100 times and only the kernel is different, you can clearly see the results:

Physical environment:
------------------------
1. two of the same monitor
2. Both DP plugged
3. I haven't changed the X in the machine which Terence shipped to me. 

Test Results:
------------------------
1. older kernel: 
   One DP monitor will come up a warning message “DisplayPort no signal”, and the other one always be OK. In my tests, the reproduce rate almost 10%(Totally loop running 100 times X start and stop).

2. latest -next-queued kernel:
------------------------
Worked perfect. loop running 100 times X start and stop, all passed.But the latest kernel has another issue(It's not related to this bug):
Bug #65287 - [IVB regression dp] *ERROR* mismatch in adjusted_mode.flags (expected 1, found 0)

So we get a conclusion: this bug has been fixed on latest kernels. We can close it now.
Comment 53 Chris Wilson 2013-06-13 07:26:50 UTC
We are tracking the new warning (bug 65287), it's minor. Treating this as fixed and presuming it was the shared dpll rework.
Comment 54 Daniel Vetter 2013-06-13 07:35:00 UTC
Most likely fixed with

commit cdbd2316a03f68b25a135a34d1d24f01ddef0c53
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Jun 5 13:34:03 2013 +0200

    drm/i915: fix up pch pll handling in ->mode_set

Should easily apply on 3.10-rc kernels or 3.9 still, so if you want this backported please test. Atm the entire shared dpll rework series will be merged into 3.11.
Comment 55 Jesse Barnes 2013-06-13 14:52:49 UTC
On Mon, 27 May 2013 14:21:46 +0000
bugzilla-daemon@freedesktop.org wrote:
> > > Hi Imre,
> > > A little confused, that is there such converter which HDMI port to DP? If
> > > there's such converter, is it a active one?
> > 
> > There is, and I guess by definition it has to be active.
> 
> Thanks Imre, that make sense.

Just to confirm, you tested by connecting monitors to both of the DP
ports on the machine Terence sent?  I don't think an HDMI->DP dongle on
the HDMI port will reproduce this problem...

Jesse
Comment 56 shui yangwei 2013-06-14 00:37:38 UTC
(In reply to comment #55)
> On Mon, 27 May 2013 14:21:46 +0000
> bugzilla-daemon@freedesktop.org wrote:
> > > > Hi Imre,
> > > > A little confused, that is there such converter which HDMI port to DP? If
> > > > there's such converter, is it a active one?
> > > 
> > > There is, and I guess by definition it has to be active.
> > 
> > Thanks Imre, that make sense.
> 
> Just to confirm, you tested by connecting monitors to both of the DP
> ports on the machine Terence sent?  I don't think an HDMI->DP dongle on
> the HDMI port will reproduce this problem...
> 
> Jesse

There's two DP on the machine, I connect both pipe directly to the machine. I have reproduced this problem they have got, then I use -next-queued latest kernel, the problem is gone. There's no HDMI on this machine. It support 2 DP and 1 DVI.
Comment 57 Jari Tahvanainen 2016-10-07 05:39:17 UTC
Closing verified+fixed.


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