Created attachment 123654 [details] Text corruption screenshot When viewing github popups with Firefox on my Skylake GT2 system, the rendered text is corrupted (see screenshot). On rare occassions, I see the same thing when scrolling in Konsole. xf86-video-intel git master from earlier today (sna + dri3), linux 4.6.0-rc7, xorg-server 1.18.3, Mesa 11.3.0-devel (git-be5010c).
Can you please try "git revert 81029be07380090195d165fab91d3e1fe1d84bb9" ?
(In reply to Chris Wilson from comment #1) > Can you please try "git revert 81029be07380090195d165fab91d3e1fe1d84bb9" ? Didn't change a thing. As a side note, the issue doesn't appear when I switch to UXA, so it's indeed a SNA issue.
I think I see the same glitch sporadically (it looks like swizzling, where a pair of 16 pixels are swapped over). It's proving very difficult to reproduce reliably and bisects are not yet revealing anything tangible.
I saw similar Firefox glitches a few months ago after updating the kernel - the kernel bisect led to changes made to the ACPI interpreter, and once that was fixed the glitches went away. So perhaps try an older kernel if possible.
Created attachment 126287 [details] Text Corruption in Konsole I can confirm this bug. Attached is a screenshot of the bug on Konsole when scrolling rapidly. Reproducible easily every time. Skylake P530.
(In reply to Chris Wilson from comment #3) > I think I see the same glitch sporadically (it looks like swizzling, where a > pair of 16 pixels are swapped over). It's proving very difficult to > reproduce reliably and bisects are not yet revealing anything tangible. Open up Konsole. Do something to get a lot of text on the screen. Scroll up and down in the window really fast. That reproduces it every time for me.
I can't reproduce this bug anymore.
(In reply to Armin K from comment #7) > I can't reproduce this bug anymore. Please confirm your current environment where bug is not reproduced
xf86-video-intel snapshot from Sep 28 2016, xorg-server-1.18.99.902, mesa-13.0.0, linux-4.8.6.
(In reply to Armin K from comment #9) > xf86-video-intel snapshot from Sep 28 2016, xorg-server-1.18.99.902, > mesa-13.0.0, linux-4.8.6. thx :)
I'm still seeing this in Konsole with xf86-video-intel git 028c946df0855728b2a34d1d588701dc6c5ad4c1 from 2017-01-03, Mesa 13.0.3, Linux 4.9.1, and xorg-server 1.18.4. I will try bumping xorg-server to match Armin K's environment.
I was on X Server 1.19 release candidate, not 1.18.4. Maybe there's the catch?
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