Bug 77660

Summary:

[HD-4400]upsteam kernel (drm-intel-nightly/2014-04-17-trusty) causes blank screen on lenovo X1 Carbon 2014.

Product:

DRI

Reporter:

Chunlei Wu <anewgene+freedesktop>

Component:

DRM/Intel

Assignee:

Imre Deak <imre.deak>

Status:

CLOSED FIXED

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

normal

Priority:

medium

CC:

anewgene+freedesktop, intel-gfx-bugs

Version:

XOrg git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Xorg.0.log	none
dmesg.txt	none
intel_reg_dumper.txt	none
xrandr.txt	none
dmesg log with drm.debug=0xe	none

Description Chunlei Wu 2014-04-18 22:14:17 UTC

Created attachment 97580 [details]
Xorg.0.log

Bug description:
    This is related to this bug I reported here: 

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1307623

    I tried the upstream kernel from drm-intel-nightly (2014-04-17-trusty) in order to investigate the bug above. It actually solved the external monitor resolution issue, however I had another even more critical issue: my laptop display turns blank completely. It remains blank even when I boot it without any external monitor.



System environment:
-- chipset: intel i7-4600U (HD-4400)
-- system architecture: 64-bit
-- kernel: from upstream mainline kernel at http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/
-- Linux distribution: Ubuntu 14.04
-- xserver: 1.15.1
-- xserver-xorg-video-intel: 2:2.99.910-0ubuntu1 
-- Machine or mobo model: Lenovo X1 Carbon 2014 (20A7CTO1WW)
-- Display connector: DisplayPort

Reproducing steps:
* install upstream kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2014-04-17-trusty/
* boot with this kernel

Comment 1 Chunlei Wu 2014-04-18 22:15:29 UTC

Created attachment 97581 [details]
dmesg.txt

Comment 2 Chunlei Wu 2014-04-18 22:16:02 UTC

Created attachment 97582 [details]
intel_reg_dumper.txt

Comment 3 Chunlei Wu 2014-04-18 22:16:19 UTC

Created attachment 97583 [details]
xrandr.txt

Comment 4 Chunlei Wu 2014-04-18 22:19:33 UTC

Might be related to this bug:

https://bugs.freedesktop.org/show_bug.cgi?id=77418

Comment 5 Chunlei Wu 2014-05-01 04:53:11 UTC

Tried the latest 3.15 rc2 kernel and drm-intel-nightly kernel, still the same issue:

linux-headers-3.15.0-031500rc2_3.15.0-031500rc2.201404201435_all.deb
linux-headers-3.15.0-031500rc2-generic_3.15.0-031500rc2.201404201435_amd64.deb
linux-image-3.15.0-031500rc2-generic_3.15.0-031500rc2.201404201435_amd64.deb


and 

linux-headers-3.15.0-994_3.15.0-994.201404300205_all.deb
linux-image-3.15.0-994-generic_3.15.0-994.201404300205_amd64.deb
linux-headers-3.15.0-994-generic_3.15.0-994.201404300205_amd64.deb

I don't even know where to start the debugging.

Comment 6 Jani Nikula 2014-05-05 07:36:59 UTC

(In reply to comment #1)
> Created attachment 97581 [details]
> dmesg.txt

Please set drm.debug=0xe module parameter and attach dmesg again.

Comment 7 Chunlei Wu 2014-05-09 21:36:01 UTC

Thanks. I'm also following this relevant bug 73539 and noticed there is a fix there. Just tried the latest drm-intel-nightly kernel (3.15.0-994_3.15.0-994.201405080316), and the black screen issue seem being solved now.

Comment 8 Chunlei Wu 2014-05-09 21:42:11 UTC

Created attachment 98781 [details]
dmesg log with drm.debug=0xe

In case it's useful for double-check, I'm still attaching my dmesg log with drm.debug=0xe .

Comment 9 Chunlei Wu 2014-05-09 23:25:27 UTC

The new drm-intel-nightly kernel solves blank screen issue, but caused the lost of native resolution on OneLink Pro displayport, which was fixed before. I fired a new bug 78507.

Comment 10 Jani Nikula 2014-05-12 06:45:53 UTC

Chunlei Wu, is this issue resolved now?

Comment 11 Chunlei Wu 2014-05-12 16:37:38 UTC

Yes, the blank screen issue reported in this bug has been solved in drm-intel-nightly kernel.

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