Bug#949710: /usr/bin/plasmashell: segfaults sporadically but only when using app dropdown menu
Hi Bernhard,
you seem to be triaging a lot of segfault bugs recently ;-)
>Usually when a segfault happens in 'dmesg' output should
>appear two lines about this event. Maybe you could forward
>these to the report too.
We debugged this together, as it just happened when we were
discussing the bugreport again. Interestingly enough, there
is nothing related in dmesg (last entry a couple of minutes
after boot).
>If it is possible to install systemd-coredump a backtrace
>would be automatically added to the journal, which could
>be viewed by 'journalctl --no-pager'.
We installed systemd-coredump.
>[1] https://wiki.debian.org/HowToGetABacktrace#Installing_the_debugging_symbols
We installed all debug symbol packages (from the goodies)
and gdb-minimal (or does it need gdb full?) and will see
when it happens next.
Some more ideas:
• it only happens on a Tuxedo laptop, but not on a Mac mini
• while it happened, VMs (libvirt/virt-manager/SPICE-QXL)
were in use
Display is: lspci…
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
… and lshw…
*-display
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 07
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:127 memory:db000000-dbffffff memory:90000000-9fffffff ioport:f000(size=64) memory:c0000-dffff
As for the X video subsystem in use, xserver-xorg-video-all is
installed and I don’t know how to find out the one in actual use,
but the following X modules are loaded:
[ 64.097] (II) LoadModule: "glx"
[ 64.106] (II) LoadModule: "modesetting"
[ 64.108] (II) LoadModule: "fbdev"
[ 64.109] (II) LoadModule: "vesa"
[ 64.129] (II) LoadModule: "fbdevhw"
[ 64.130] (II) LoadModule: "glamoregl"
[ 64.251] (II) LoadModule: "fb"
[ 64.593] (II) LoadModule: "libinput"
(This is just one more, fbdevhw, than my own laptop has.)
I think it’s using KMS and no extra X driver.
As to firmware, i915/kbl_dmc_ver1_04.bin (v1.4) is loaded,
as are intel/ibt-12-16.ddc, intel/ibt-12-16.sfi, and others
(iwlwifi, Blåtand, r8169) that are unrelated.
Not sure how much this helps…
bye,
//mirabilos
--
15:39⎜«mika:#grml» mira|AO: "mit XFree86® wär’ das nicht passiert" - muhaha
15:48⎜<thkoehler:#grml> also warum machen die xorg Jungs eigentlich alles
kaputt? :) 15:49⎜<novoid:#grml> thkoehler: weil sie als Kinder nie den
gebauten Turm selber umschmeissen durften? -- ~/.Xmodmap wonders…
Reply to: