Comment 120 for bug 1522922
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#120 |
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1b1ed1a
(Get the code!)
(In reply to Mika Kahola from comment #110)
> (In reply to alex from comment #109)
> > Dammit. Now this regression has made it into the LTS kernel. Are you guys
> > kidding me? Is it not possible for the changes that caused this
> > exceptionally annoying regression (as in my computer is now almost entirely
> > unusable) to be removed from the current production kernel, pending a proper
> > fix?????
>
> My current understanding is that there are multiple causes for flickering.
> Reverting this patch may solve an issue with one platform. Could you share
> your dmesg log with drm.debug=0x1e for further analysis, please.
Posted. I rebooted into the stock 4.5.1 kernel (direct from the Arch repository) with drm.debug=0x1e added to the kernel command line, logged in, suspended, resumed, and dumped the log with journalctl. I took a quick check through and didn't see any messages that indicated any sort of failure after the suspend operation. However there are a lot of messages in there, so I could have missed something. What I do know is that after the resume from suspend, I get something on the order of a 2 Hz flicker on the display that looks like the eDP link is flapping - i.e. there is tearing that affects the bottom portion of the display more than the top due to the link going down in the middle of a frame, portions of the display are briefly distorted or colored strangely, etc. None of this happens on 4.1.21, which is where I will stay until this gets a proper fix in the mainline.