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Re: upgrade to X 1.20.0 broken

I had the same issue after an update yesterday on my Thinkpad T410 with a GeForce 9100M running Debian Sid using Nouveau display drivers.  The problem seemed to be caused by the Xfce compositor as disabling it let me log in normally.  Other window managers also seemed to work (WindowMaker in my case)

On 05/29/2018 08:38 PM, rogerh@xxxxxxxxxxxx wrote:

I am running sid, and updated to X.org 1.20.0. Since then I cannot login.

I am running lightdm with xfce. lightdm comes up just fine, but when I login,
after a second or two, it comes back to the lightdm login screen. I have
an old
graphics card (EVGA 6600GT) and monitor (NEC 1970GX) from 2005. They use the
nouveau display driver.

Has anyone else run into this problem? I am not sure if this is an
xserver-xorg-core problem or an nouveau problem. The only change for nouveau
that I am aware of is that xserver-xorg-video-nouveau was rebuilt against
xserver 1.20.

Below are the error messages that I could find. I'm not sure how to interpret
the backtrace.

from /home/myhome/.xsession-errors:

dbus-update-activation-environment: setting
/usr/bin/x-session-manager: X server already running on display :0
xfce4-session-Message: 14:51:48.954: SSH authentication agent is already
gpg-agent[1243]: WARNING: "--write-env-file" is an obsolete option - it
has no effect
gpg-agent: a gpg-agent is already running - not starting a new one

(xfce4-session:1226): xfce4-session-WARNING **: 14:51:48.958: gpg-agent
returned no PID in the variables
Thunar: Cannot open display:
xfwm4: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0.
xfce4-session: Fatal IO error 11 (Resource temporarily unavailable) on X
server :0.

from /var/log/Xorg.0.log:

[  7878.421] (EE)
[  7878.421] (EE) Backtrace:
[  7878.422] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4d)
[  7878.422] (EE) 1: /usr/lib/xorg/Xorg (0x557176ff8000+0x1b73b9)
[  7878.422] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0
(0x7fdff8720000+0x11f50) [0x7fdff8731f50]
[  7878.422] (EE) 3: /usr/lib/xorg/Xorg (miRenderColorToPixel+0xe)
[  7878.422] (EE) 4: /usr/lib/xorg/modules/libexa.so
(0x7fdff5190000+0xf12b) [0x7fdff519f12b]
[  7878.422] (EE) 5: /usr/lib/xorg/Xorg (0x557176ff8000+0x13a786)
[  7878.422] (EE) 6: /usr/lib/xorg/Xorg (0x557176ff8000+0x12eaec)
[  7878.422] (EE) 7: /usr/lib/xorg/Xorg (0x557176ff8000+0x5b008)
[  7878.422] (EE) 8: /usr/lib/xorg/Xorg (0x557176ff8000+0x5f008)
[  7878.422] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6
(__libc_start_main+0xe7) [0x7fdff8381a87]
[  7878.422] (EE) 10: /usr/lib/xorg/Xorg (_start+0x2a) [0x557177040d0a]
[  7878.422] (EE)
[  7878.422] (EE) Segmentation fault at address 0x8
[  7878.422] (EE)
Fatal server error:
[  7878.422] (EE) Caught signal 11 (Segmentation fault). Server aborting
[  7878.422] (EE)
[  7878.422] (EE)
Please consult the The X.Org Foundation support
	 at http://wiki.x.org
  for help.
[  7878.422] (EE) Please also check the log file at "/var/log/Xorg.0.log"
for additional information.
[  7878.422] (EE)
[  7878.422] (II) AIGLX: Suspending AIGLX clients for VT switch
[  7878.422] (II) NOUVEAU(0): NVLeaveVT is called.
[  7878.423] (EE) Server terminated with error (1). Closing log file.

Thanks for any help.