After upgrade to Ubuntu 20.04 most KDE native apps are now crashing and
this includes systemsettings5. segfault stacktrace points to crash in
/usr/lib/x86_64-linux-gnu/dri/iris_dri.so
> inxi -G
Graphics: Device-1: Intel HD Graphics 530 driver: i915 v: kernel
Display: x11 server: X.Org 1.20.8 driver: intel resolution:
3440x1440~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 530 (SKL GT2) v: 4.6 Mesa
20.1.8
xserver-xorg-video-intel version 2:2.99.917+git20200226-1
Setting MESA_LOADER_DRIVER_OVERRIDE=i965 does resolve this issue
completely, however I am wondering why this is not selected
automatically if iris driver does not support my GPU.
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https://bugs.launchpad.net/bugs/1876219
Title:
iris driver for old cpu
Status in Mesa:
Confirmed
Status in mesa package in Ubuntu:
Confirmed
Status in ring package in Ubuntu:
New
Status in vlc package in Ubuntu:
Invalid
Bug description:
I am not completely sure where I should file the bug. I am using
Lubuntu 20.04 with lxqt, and since the upgrade to 20.04 iris is the
default graphics driver, which results in crashes in multiple apps
including guvcview and calibre. Setting
MESA_LOADER_DRIVER_OVERRIDE=i965 fixed the problem. I am not sure but
is it true that iris does not support older generations of Intel CPUs?
If it is the case would it be possible to revert to i965 in those
circumstances? Thanks!
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