A Bug In The Intel Linux Graphics Driver Is Causing KDE's Plasma 5 To Crash

[Kano]

It seems that ickle does not use KDE that often. In mesa 9 there was a change that made in patched kwin from KDE 4.4 instable as well. At least compile problems with Intel ddx get fixed very fast in case it happens.

[e8hffff]

26
Is that why KDE5 was so crash and burn on my Nuc5i5

[persept]

I actually found a better workaround than using UXA. I set xorg to use DRI version 1 instead of 2 which it used by default and reverted to the not git releases of xf86-video-intel and mesa. So far I have had 0 crashes with DRI1 and SNA, and much better performance than using UXA (I can't notice any difference in performance compared with the default DRI2).
I put this in /etc/X11/xorg.conf.d/20-intel.conf

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "AccelMethod"  "sna"
   Option "DRI" "1"
EndSection

[sarfarazahmad]

I actually found a better workaround than using UXA. I set xorg to use DRI version 1 instead of 2 which it used by default and reverted to the not git releases of xf86-video-intel and mesa. So far I have had 0 crashes with DRI1 and SNA, and much better performance than using UXA (I can't notice any difference in performance compared with the default DRI2).
I put this in /etc/X11/xorg.conf.d/20-intel.conf

Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "DRI" "1"
EndSection

Thanks been seeing plasma crash quite often on manjaro 0.8.13 myself. guess its just not that often as reported by one arch user. Will head home and try this out and report back !

[byECHO]

I actually found a better workaround than using UXA. I set xorg to use DRI version 1 instead of 2 which it used by default and reverted to the not git releases of xf86-video-intel and mesa. So far I have had 0 crashes with DRI1 and SNA, and much better performance than using UXA (I can't notice any difference in performance compared with the default DRI2).
I put this in /etc/X11/xorg.conf.d/20-intel.conf

Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "AccelMethod" "sna"
Option "DRI" "1"
EndSection

I have a Haswell gpu. My system became unusable after I set dri to 1. Also, in my case, I can't notice any performance difference between UXA and SNA. I'm using Arch Linux with linux-ck kernel. But I can confirm that changing Accel Method to UXA fixes the issue.

[Michael_S]

On Fedora 22 KDE spin I had repeated crashes with Nouveau and nVidia with KDE 5. I've switched to GNOME, and so far the stability is flawless.

So how much of these bugs are "KDE exposes graphics driver flaws" and how much are "KDE makes incorrect graphics calls"? I have no idea.

[byECHO]

On Fedora 22 KDE spin I had repeated crashes with Nouveau and nVidia with KDE 5. I've switched to GNOME, and so far the stability is flawless.

So how much of these bugs are "KDE exposes graphics driver flaws" and how much are "KDE makes incorrect graphics calls"? I have no idea.

It is actually caused by QML. KDE 5 mostly uses QML for rendering so It is not KDE's fault.

[asdfblah]

There has been a pervasive issue for months with plasma 5 locking up and requiring "killall plasmashell ; plasmashell" and it's certainly not limited to Intel cards... I have an ATI Radeon - same issue. This has been reported and documented ad nauseam and the answer has been "oh you have an intel card"... so yeah, there might indeed be an issue with an Intel driver, but plasma 5 has bigger issues than this... I'm getting the feeling the plasma folks are thinking "oh, it's just intel" - hope that isn't the case, cause it certainly isn't.

Did you report the bug to the devs? Tried debugging it?

Xubuntu on Mullins and Radeon driver: I open Thunar and screen hangs for a second and every 5 seconds. Winetricks the same wile the Cooler runs like crazy, some times with Thunar to. Doesn't happen with Catalyst. I work with Pcmanfm for now plus Compton, because not even Vsync works right. The default Xfce compositor does a cut at the upper 1/10 of the screen.

Try asking for help in http://www.phoronix.com/forums/forum...urce-AMD-Linux ? Give them the specs of your system...

[TheBlackCat]

So how much of these bugs are "KDE exposes graphics driver flaws" and how much are "KDE makes incorrect graphics calls"? I have no idea.

Considering that the problem was originally identified by someone using mpv, not KDE, and that it is marked as "high critical" on the Mesa bug tracker, this bug is pretty clearly not KDE's fault.

[gbcox]

Did you report the bug to the devs? Tried debugging it?

Yes, it has been reported here: https://bugzilla.redhat.com/show_bug.cgi?id=1217844