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Tasklist

FS#45310 - [xf86-video-intel] 2.99.917-5 glitches with broadwell video chips

Attached to Project: Arch Linux
Opened by Jordan B (Xero) - Saturday, 13 June 2015, 02:29 GMT
Last edited by Doug Newgard (Scimmia) - Thursday, 25 June 2015, 03:21 GMT
Task Type Bug Report
Category Upstream Bugs
Status Closed
Assigned To Jan de Groot (JGC)
Andreas Radke (AndyRTR)
Laurent Carlier (lordheavy)
Architecture All
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 5
Private No

Details

Description: xf86-video-intel 2.99.917-5 glitches with broadwell video chips


Additional info:
* package version(s): extra/xf86-video-intel 2.99.917-5 (xorg-drivers xorg)
* config and/or log files etc.


Steps to reproduce:
On nearly any laptop with a broadwell video chip, (intel 5500, or the like), such as the Thinkpad Carbon X1 Gen3, or the latest generation Dell XPS 13, simply start up dosbox or "mplayer -vo xv" or pretty much anything with XV video output, and you will experience corruption, green lines, distortion, etc
This task depends upon

Closed by  Doug Newgard (Scimmia)
Thursday, 25 June 2015, 03:21 GMT
Reason for closing:  Fixed
Comment by Jordan B (Xero) - Saturday, 13 June 2015, 02:32 GMT
More details of the same problem:
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1432194

EDIT: seems there's a few possible bugs that might have some overlap in terms of reports, so that thread may not be as useful as I thought, the below poster seems to have found the correct bug.

this can be worked around by using xf86-video-intel-git, but given that broadwell CPU laptops are going to be more and more common this should likely get fixed in the stable release.
Comment by Nicholas Narsing (soren121) - Saturday, 13 June 2015, 06:05 GMT
The upstream bug in question is here: https://bugs.freedesktop.org/show_bug.cgi?id=89807

And this the patch that needs to be backported (do we backport patches in Arch?): http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=c43617b739e358064396912c7a7a8028ca91d201
Comment by Doug Newgard (Scimmia) - Saturday, 13 June 2015, 06:12 GMT
The general guideline is that patches can be backported for build issues and major usability issues, as determined by the judgement of the maintainer. There are exceptions, of course.
Comment by Jordan B (Xero) - Saturday, 13 June 2015, 07:42 GMT
This is definitely a pretty major usability issue on any broadwell machine. It makes most windowed video playback pretty much unusable, dosbox is a complete box of distortion, vlc, mplayer, and skype, among others, are also completely distorted and unusable. I imagine pretty much anything using XV video output is broken/badly distorted until this is addressed.
Comment by Nicholas Narsing (soren121) - Sunday, 14 June 2015, 21:31 GMT
I agree that this patch should be backported. It causes major video corruption in several popular applications on all Broadwell machines using integrated graphics. Normally I would vote to wait for an update, but upstream has had this fixed in git for nearly two months and hasn't yet released an update that includes the fix. We should have it patched here in the meantime.
Comment by Laurent Carlier (lordheavy) - Monday, 15 June 2015, 19:05 GMT
Please test with xf86-video-intel-2.99.917-6 in testing
Comment by Nicholas Narsing (soren121) - Monday, 15 June 2015, 19:31 GMT
-6 segfaults upon start.

EDIT: Might be the result of a new bug upstream: https://bugs.freedesktop.org/show_bug.cgi?id=90978
   xorg.log (11.4 KiB)
Comment by Laurent Carlier (lordheavy) - Tuesday, 16 June 2015, 15:27 GMT
I've updated the driver to latest git snapshot.
Please test with xf86-video-intel-2.99.917.20150616 in testing
Comment by Nicholas Narsing (soren121) - Tuesday, 16 June 2015, 15:53 GMT
The 20150616 package works. Thank you.

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