Bug 17807 - [GM45 T500] X Freezes on resume when DRI enabled
Summary: [GM45 T500] X Freezes on resume when DRI enabled
Status: RESOLVED DUPLICATE of bug 20214
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: 7.4 (2008.09)
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: Wang Zhenyu
QA Contact: Xorg Project Team
Depends on:
Reported: 2008-09-27 14:15 UTC by Jason Smith
Modified: 2009-03-01 18:40 UTC (History)
8 users (show)

See Also:
i915 platform:
i915 features:

Xorg log after a resume and killing X (to avoid hardlock) (28.79 KB, text/plain)
2008-09-27 14:15 UTC, Jason Smith
no flags Details
Normal Xorg log after a fresh boot (27.42 KB, text/plain)
2008-09-27 14:17 UTC, Jason Smith
no flags Details
ModeDebug Xorg.0.log (99.72 KB, text/plain)
2008-09-27 20:45 UTC, Jason Smith
no flags Details
Xorg log from a failed resume hang (178.27 KB, text/plain)
2008-09-30 14:09 UTC, Jason Smith
no flags Details

Description Jason Smith 2008-09-27 14:15:53 UTC
Created attachment 19259 [details]
Xorg log after a resume and killing X (to avoid hardlock)

The title gives the general idea but, if I suspend my machine via echo mem > /sys/power/state or via the gnome scripts it will suspend fine.  When it resumes however, it will hang when it tries to re-enter X.  So long as I leave it in console, it will not hang.  If I disable Accel and ensure that the drm module does not load, resume from suspend works just fine.

Further, should I instruct the machine to restart X instead of trying to enter my existing session (with all my work), it will start a new session with glitches.  It believes at this point that my VGA port is connected to a monitor (it is not), and that my screen resolution should be 1152x864.  It also incorrectly reports the physical size of the screen.

I am running Ubuntu 8.10 Alpha
kernel: 2.6.27-rc7
Xorg: 7.4
XServer: 1.5
Intel Driver: 2.4.2
Frustration level: Maximum

Lenovo Thinkpad T500 w/ Intel G45 (no ati card)
3GB of DDR3
Comment 1 Jason Smith 2008-09-27 14:17:41 UTC
Created attachment 19260 [details]
Normal Xorg log after a fresh boot
Comment 2 Wang Zhenyu 2008-09-27 19:24:51 UTC
Could you try xf86-video-intel git master?
Comment 3 Jason Smith 2008-09-27 20:37:13 UTC
Git was installed, bad bad things happened.
- Suspend was (as far as I can test) not fixed.
- When I switch to VT, Xorg crashes causing GDM to fire up a new session
- Above bug breaks suspend scripts that switch to a vt first
- Doing echo mem > /sys/power/state suspends properly but presents a frozen (and quite colorful) Xorg on resume
Comment 4 Jason Smith 2008-09-27 20:45:28 UTC
Created attachment 19265 [details]
ModeDebug Xorg.0.log

Here is a xorg log with modedebug enabled
Comment 5 Wang Zhenyu 2008-09-27 22:45:49 UTC
Do you mean current master breaks VT switch on your T500?
Comment 6 Jason Smith 2008-09-28 08:13:34 UTC
Yes, that is exactly what I mean
Comment 7 Wang Zhenyu 2008-09-30 05:06:36 UTC
What libdrm version are you using? Eric has fixed an assert issue within libdrm_intel on drm git master, which caused VT switch aborted X.
Comment 8 Jason Smith 2008-09-30 06:12:06 UTC
libdrm Git from Sept 22, 2008
Comment 9 Jason Smith 2008-09-30 10:15:35 UTC
I updated to your bzr version of libdrm and your latest version of intel_drv.so.  Things seem to be working now.  I will reopen if the issue re-appears.  Thank you!
Comment 10 Jason Smith 2008-09-30 13:17:24 UTC
Bad news.  While the update has considerably improved the reliability of suspend.  Occasionally I still get the same freezing as originally described.  This still leaves suspend somewhat useless.  It probably occurs 10-20% of the time now as opposed to 95% of the time.
Comment 11 Jason Smith 2008-09-30 14:09:05 UTC
Created attachment 19318 [details]
Xorg log from a failed resume hang

I hope this xorg log contains some useful information.  Some of it looks looks useful.  This is a log from an Xorg that was alive during a failed resume.
Comment 12 Eric Anholt 2008-10-14 16:03:11 UTC
This needs to be retested against current drm-intel-next kernel and master xf86-video-intel.  Resume issues is one effect we expected we could see from the bad stolen memory accounting.
Comment 13 Patrick McLean 2008-10-30 08:38:00 UTC
I am getting this same problem on my T500 with current git master of both libdrm and xf86-video-intel and kernel with this patch applied:


Should I test with the drm-intel-next as well, and if so where do I pull it from (is it the one on kernel.org)?
Comment 14 Russell Ryan 2008-11-05 08:08:40 UTC
For more information, here is a (looks to be the same) bug on the Ubuntu Launchpad:


For me, this is a regression. S3 worked fine on my T400 in Ubuntu 8.04, and not in 8.10. 
Comment 15 Russell Ryan 2008-11-05 08:30:38 UTC
More, hopefully helpful, information:

The following workaround apparently works for some people:


Also mentioned here:


Comment 16 Wang Zhenyu 2008-11-05 17:30:52 UTC
Russell, do you mean this is a problem with SMP suspend/resume?

We're still pending on test result of this bug. Could you test with Eric's kernel tree? which has recent gem fix and includes Keith's fix for save/restore render standby in suspend/resume.
Comment 17 Russell Ryan 2008-11-05 17:38:13 UTC
It is interesting that forcing uniprocessing is a workaround. As commenters in that thread imply, it would seem the bug has something to do with a lack of proper mutual exclusion somewhere in the driver. I know very little of the driver itself, or how X makes use of it, so I have no idea if this is the case. I imagine that would be better answered by a driver developer such as yourself. I was only attempting to provide more information about the bug, and link the problems across bugtrackers.

As for running from Eric's kernel tree, I've never compiled the intel driver from source, so it will take me a little bit to get setup and running. I'll try to get that done soon and get back to you.

Comment 18 Thomas Georgiou 2008-11-08 07:26:58 UTC
I have the same bug with my T400.  I've tested it with the drm-intel-next kernel branch, and 2.6.28 rcs, and the intel driver from git, but it all fails to resume properly.  I did however get it working sometimes, but it was very unreliable.  I have to put in "NoAccel" "true" in my xorg.conf to get hibernating working.
Comment 19 Thomas Georgiou 2008-11-08 07:30:26 UTC
Also, disabling the other core fixes this issue for me as well.
Comment 20 Patrick McLean 2008-11-10 09:16:27 UTC
My T500 also fails with git master and drm-intel-next from last Monday.
Comment 21 Gordon Jin 2009-01-22 23:15:01 UTC
Jian, can you test this on T500 machine?
Comment 22 Wang Zhenyu 2009-02-01 21:18:12 UTC
reassign to who has the machine now.
Comment 23 zhao jian 2009-02-08 19:27:52 UTC
I tested on my Lenovo T500(GM45-64bit) with 4G memory, it works well with DRI enabled. Following is the configuration: 

arch:              x86_64
Libdrm:           (master)           9c8d634e687a5a5b5d314b3fd5b34cc17a217139
Mesa:             (mesa_7_4_branch)  7e8f2c56c00f93ad55842dc5e3b123a1fcf74b3c
Xserver:          (server-1.6-branch)1f729b42d567ae9533ac0e467afc9fbc83390776
Xf86_video_intel: (master)           3aa8591abfbe8db0f13912910c850fdd748808df
Kernel:           (drm-intel-next)   9ac37e9d74785997abdd344866b648dd213aae04

Comment 24 Helge Bahmann 2009-02-19 10:36:32 UTC
symptoms appear to be the same as bug #20214 -- see there as to why it probably fails for OP on 2.6.27-rc7 but works for 2.6.28 as in comment 23
Comment 25 Michael Fu 2009-03-01 18:40:35 UTC
bug reporters, please reopen if the patch commited for bug# 20214 doesn't work for you.

*** This bug has been marked as a duplicate of bug 20214 ***

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