https://bugs.freedesktop.org/show_bug.cgi?id=73530
--- Comment #69 from Nicolas Werner nicolas.werner@ymail.com --- (In reply to Alex Deucher from comment #65)
*snip*
In reply to Christian Aßfalg from comment #63)
I think / guess that I am having the same issues. I've got the same laptop, running Arch Linux. Mostly, I've been using the proprietary catalyst driver, since I never got the free driver working. The proprietary is working fine.
What is the issue here? You've been playing with timings for the physical link to the internal panel? Is it so frickly? What would you need to fix the issue? How can I help?
I suggested that it might be a timing issue, and as per comment 54. However, link training is successful so that monitor accepts the parameters that the driver proposed, it just sometimes chooses not to light up. I would suggest trying to tweak the link training timing as per comment 54, try disabling ss as per comment 6, and finally, try making some slight changes to the modeset sequence as per the attached patch. The patch adds a delay before enabling the video stream and additionally calls the enable video stream code again in case the monitor didn't quite get the signal the first time. E.g., *snip*
I also have the same problem. (same notebook, so not surprising)
I tried everything you recommended (in comment #65), in order, nothing helps. Any more suggestions?
Btw, I'm using OpenSUSE, so Kernel 3.16.6.
Also xrandr output is much shorter than the ones posted here, is that normal when you use modeset=0?
xrandr -q --verbose xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected primary 1920x1080+0+0 (0x180) normal (normal) 0mm x 0mm Identifier: 0x17f Timestamp: 7692 Subpixel: unknown Clones: CRTC: 0 CRTCs: 0 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: 1920x1080 (0x180) 159.667MHz *current h: width 1920 start 0 end 0 total 1920 skew 0 clock 83.16KHz v: height 1080 start 0 end 0 total 1080 clock 77.00Hz