[current] [intel graphics] Display artifacts

sombragris · 04-23-2017, 07:51 PM

Using slackware64-current, AlienBob's Plasma 5, Intel Haswell Mobile GPU.

Starting from today I'm seeing strange artifacts:

Some GTK2 applications stop to display letters. For example, one cannot see menus.

LibreOffice stops displaying random letters within its documents. For example, "Ireland" looks like "Ire and".

QT/Plasm/KDE apps do not seem to be affected.

Saw an article on a Ubuntu issue very similar and the workaround offered was to turn off subpixel hinting.

If someone knows of a workaround I'd be grateful.

Thanks!!

Pearlseattle · 04-24-2017, 09:43 AM

Shot in the dark:
what do you see when you execute these 2 commands?

Code:

cat /sys/module/i915/parameters/enable_psr
cat /sys/module/i915/parameters/enable_fbc

Asking because the last time I tried to activate panel self-refresh I got all kind of weirdness happening with text... .

sombragris · 04-24-2017, 04:59 PM

Quote:

Originally Posted by Pearlseattle

Shot in the dark:
what do you see when you execute these 2 commands?

Code:

cat /sys/module/i915/parameters/enable_psr
cat /sys/module/i915/parameters/enable_fbc

Asking because the last time I tried to activate panel self-refresh I got all kind of weirdness happening with text... .

Let's see:

Code:

cat /sys/module/i915/parameters/enable_psr

0

Code:

cat /sys/module/i915/parameters/enable_fbc

-1

(I don't have the slightest idea of what these are).

sombragris · 04-24-2017, 05:00 PM

Forgot to add: these errors are not 100% reproducible. After booting, the system looks OK. It's only after several hours of use that these artifacts appear.

Pearlseattle · 04-25-2017, 01:06 PM

Ok, I didn't expect the "-1", but I assume that it's the same as "0", so that should be ok... .
Maybe a screenshot of the exact issue might help (e.g. to understand if it's really just missing letters or something else) => would it be possible to have a screenshot of libreoffice when this problem occurs?
Output of "uname -a" and version of the intel drivers being used would probably be useful as well... .

sombragris · 04-27-2017, 07:53 AM

Quote:

Originally Posted by Pearlseattle

Ok, I didn't expect the "-1", but I assume that it's the same as "0", so that should be ok... .
Maybe a screenshot of the exact issue might help (e.g. to understand if it's really just missing letters or something else) => would it be possible to have a screenshot of libreoffice when this problem occurs?
Output of "uname -a" and version of the intel drivers being used would probably be useful as well... .

Thanks!

uname -a

Code:

Linux xxx 4.4.38 #1 SMP Sun Dec 11 15:57:21 CST 2016 x86_64 Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz GenuineIntel GNU/Linux

findpkg intel

Code:

For "intel" the following results were found:
intel-gpu-tools-1.9-x86_64-2
libva-intel-driver-1.7.3-x86_64-1
xf86-video-intel-git_20170313_7e9e92c8-x86_64-1

When I see the issue again I'll attempt a screenshot.