[drm:intel_pipe_update_start [i915]] *ERROR* Potential atomic update failure on pipe A
Maybe the solution to get rid of the above dmesg log spamming could be mentioned? You just add `options i915 enable_psr=0` to the file `/etc/modprobe.d/i915.conf`. Bjourne (talk) 17:04, 19 August 2016 (UTC)
Backlight is not adjustable after trying various acpi_osi values
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I've seen in the forum people ask from time to time how to enable DRI3 on their system.
As stated many times there, DRI3 should be on for most (if not all) of them. But people keep telling them to check
cat /var/log/Xorg.0.log | grep DRI
which shows up this message:
GLX: Initialized DRI2 GL provider for screen 0
which is *not accurate*.
If you run this command instead:
LC_ALL=C LIBGL_DEBUG=verbose glxinfo | grep DRI
you might stump with this other message:
libGL: Using DRI3 for screen 0
which proves you are using DRI3 even though X11 doesn't reply with the correct information.
The command was adapted from xorg mailing list.
So, it think adding this information in the page could be of major interest. What do you think?
Guide for screen scaling with external displays via xrandr?
I tried to find instructions for scaling the display resolution without stretching on this wiki page, but the section only says that it's not implemented in the Intel drivers yet. However, this stackexchange thread has a workaround using an xrandr transform matrix. Should this be added to the wiki page?