Print Page - plasma freezes temporary (was: kwin crashes)

Title: plasma freezes temporary (was: kwin crashes)
Post by: orinoco on 2016/10/29, 14:45:56

Hello,

kwin crashes randomly here for some time. Even with the latest kernel.

journal: http://paste.siduction.org/20161029123923 (http://paste.siduction.org/20161029123923)
inxi: http://paste.siduction.org/20161029123936 (http://paste.siduction.org/20161029123936)

Title: Re: kwin crashes
Post by: musca on 2016/10/29, 16:37:12

Hello orinoco,
I'm not sure if this is a graphics issue or some qt-kde issue.

xserver-xorg-video-intel defaults to SNA (Sandybridge New Acceleration), but your cpu is older.
The package contains an example xorg.conf:

Code Select

mkdir -p /etc/X11/xorg.conf.d/
cp /usr/share/doc/xserver-xorg-video-intel/xorg.conf  /etc/X11/xorg.conf.d/20-intel.conf

you can try to enable Universal Xcceleration Architecture (UXA), which is the predeccessor of SNA.

#Switch to intel with UXA
Section "Device"
    Identifier "Intel"
    Driver "intel"
    Option "AccelMethod" "uxa"
EndSection

A more modern option uses version 3 of the Direct Rendering Infrastructure.
Xorg still defaults to version 2.1.

    Option "DRI" "3"

greetings
musca

Title: Re: kwin crashes
Post by: orinoco on 2016/10/30, 23:50:23

Hello musca,

thanks for your advice. My xorg configuration now looks like this

Code Select

Section "Device"
	Identifier  "Intel Graphics"
	Driver      "intel"
	Option      "AccelMethod"     "uxa"
#	Option      "AccelMethod"     "sna"
	Option      "Backlight"       "intel_backlight" # use your backlight that works here
	Option      "DRI"             "3"
	BusID       "PCI:0:2:0"
EndSection

And I upgraded to the latest kernel today:

Code Select

Linux tuxor2 4.8.5-towo.3-siduction-amd64 #1 SMP PREEMPT siduction 4.8-12 (2016-10-30) x86_64 GNU/Linux

Now kwin is not yelling about a crash anymore. Instead my Plasma Desktop freezes for about 10s. Meanwhile the journal says:

http://paste.siduction.org/20161030224721 (http://paste.siduction.org/20161030224721)

Title: Re: plasma freezes temporary (was: kwin crashes)
Post by: orinoco on 2016/11/07, 23:15:08

I can reproduce the crash with temporary freeze by running x64 from vice-package. One of five tries freezes my notebook permanently.

Title: Re: plasma freezes temporary (was: kwin crashes)
Post by: orinoco on 2016/11/11, 01:23:04

Installed latest kernel 4.8.7-towo.1 and my notebook crashes during boot and freezes permanently. All I can find as a possible reason:

BUG: unable to handle kernel NULL pointer dereference at (null)

Title: Re: plasma freezes temporary (was: kwin crashes)
Post by: orinoco on 2018/02/09, 20:07:22

Oh dear...

After more than a year I found a workaround (https://bugs.freedesktop.org/show_bug.cgi?id=93782).

Adding video=SVIDEO-1:d to the kernel cmdline did the trick.

Siduction Forum

Siduction Forum => Upgrade Warnings => Topic started by: orinoco on 2016/10/29, 14:45:56