Bug#776911: gnome-session: session fails to start with "something went wrong" message

[Rafał Pietrak]

W dniu 13.03.2015 20:56, Simon McVittie pisze:
> On Fri, 06 Feb 2015 at 18:20:35 +0000, Simon McVittie wrote:
>> This sounds a lot like another instance of
>> <https://bugs.debian.org/775235> and
>> <https://bugs.debian.org/770130> on which some debugging has
>> already been done.
> I am able to reproduce a similar crash on the oldest PC I could find
> (#780413). I think it's probably the same thing as #770130, but
> not #775235.
>
> Rafal, could you please provide some more information so we can
> confirm whether your crash is likely to have the same cause?
>
> * please send the output of "reportbug --template xserver-xorg-core"
>    to the bug address 776911 at bugs.debian.org
>    (it will be long: you can either attach it compressed or uncompressed,
>    or include it inline)
attached.

> * if that output mentions "GPU crash dump saved to /sys/class/drm/card0/error"
>    like mine did, please capture that to a file by running
>    "cat /sys/class/drm/card0/error > gpu-crash.txt" as root,
>    and send gpu-crash.txt too (again, it will be long, and you can
>    either attach it or send it inline)
There is no "GPU crash ..." that I can see; and 
"/sys/class/drm/card0/error" reports "no error state collected".

But I've noticed, that the "underrun error" is triggered when I read 
"/sys/class/drm/card0/card0-VGA-1/status" (an NOT, when I do that with 
LVDS -- I do use only the laptop screen and don't have VGA socket 
connected); so in case this help somebody figure it out, I'm attaching 
grep-ed syslog from time I executed the following commands.
-------------------------------------------------------------
$ cat /sys/class/drm/card0/card0-LVDS-1/status
connected
$ cat /sys/class/drm/card0/card0-VGA-1/status
disconnected
$ ls -la /sys/class/drm/card0/
total 0
drwxr-xr-x 5 root root    0 mar 15 14:31 .
drwxr-xr-x 4 root root    0 mar 15 14:31 ..
drwxr-xr-x 3 root root    0 mar 15 14:31 card0-LVDS-1
drwxr-xr-x 3 root root    0 mar 15 14:31 card0-VGA-1
-r--r--r-- 1 root root 4096 mar 15 14:31 dev
lrwxrwxrwx 1 root root    0 mar 15 14:31 device -> ../../../0000:00:02.0
-rw------- 1 root root    0 mar 15 14:31 error
drwxr-xr-x 2 root root    0 mar 15 14:31 power
lrwxrwxrwx 1 root root    0 mar 15 14:31 subsystem -> 
../../../../../class/drm
-rw-r--r-- 1 root root 4096 mar 15 14:31 uevent
$
---------------------------------------------------------

the "[drm:i8xxx..." entry shows up when I "cat ...VGA/status" from 
Xterm; while the "[drm:i9xx...." entry shows up when I do that in text 
mode from linux terminal (/dev/tty1).

it doesn't show up when I cat the LVDS status.

-R

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