[Pkg-xfce-devel] Bug#861329: Lock Screen Issues

Sean Hanna hannasm at gmail.com
Fri Jun 16 21:10:10 UTC 2017

I've pulled a number of additional error messages from the logs after
another occurrence of the problem. In this case i just was switching ttys
via ctrl-alt-f1 and then trying to return to the x session with

I'm not sure if switching ttys automatically tries to lock the screen or if
this is just another clue about where the problem is occurring.

another new error message in lightdm.log:

[+174391.19s] CRITICAL: session_get_login1_session_id: assertion 'session
!= NULL' failed

>From journalctl i see this sequence of events around the time i am changing
ttys but i'm not sure exactly when in the process it happened. There is
nothing relevant before these lines

org.a11y.atspi.Registry[2554]: XIO:  fatal IO error 11 (Resource
temporarily unavailable) on X server ":0"
 org.a11y.atspi.Registry[2554]:       after 73123 requests (73123 known
processed) with 0 events remaining.
org.a11y.atspi.Registry[3028]: XIO:  fatal IO error 11 (Resource
temporarily unavailable) on X server ":0"
 org.a11y.atspi.Registry[3028]:       after 73135 requests (73135 known
processed) with 0 events remaining.
 polkitd(authority=local)[2196]: Unregistered Authentication Agent for
unix-session:5 (system bus name :1.51, object path
/org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.utf8) (disconnected
from bus)

pam_unix(lightdm:session): session closed for user hannasm
 systemd-logind[2144]: Removed session c2.
 systemd[1]: Stopping User Manager for UID 114...
systemd[3014]: Stopping Virtual filesystem service...


It looks like during this process, Xorg restarted at least 2 times, so the
XOrg.0.log from the original session was automatically wiped out. The
XOrg.0.log.old contains timestamps starting after i hit the ctrl-alt-fX
keys. It does contain a few additional error messages.

X.Org X Server 1.19.2
Release Date: 2017-03-02
[174414.803] X Protocol Version 11, Revision 0

... snip ...

[174422.283] (EE) RADEON(G0): failed to set mode: No space left on device
[174422.283] (EE)
Fatal server error:
[174422.283] (EE) EnterVT failed for gpu screen 0
[174422.283] (EE)
[174422.283] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.
[174422.283] (EE) Please also check the log file at "/var/log/Xorg.0.log"
for additional information.
[174422.283] (EE)
[174422.284] (II) AIGLX: Suspending AIGLX clients for VT switch
[174422.288] (EE) Server terminated with error (1). Closing log file.

On Wed, Jun 14, 2017 at 2:32 PM, Sean Hanna <hannasm at gmail.com> wrote:

> I'm not sure if my issue is related or not but since there hasn't been any
> updates to yet i figured i might as well start here at least.
> Lock screen does one of two undesirable behaviors for me when initiated
> either through the menus or a commandline.
> 1) session is terminated instead of locked (all applications closed). This
> sometimes means having to enter my username and password twice. Sometimes i
> only have to enter it once but either way all the old applications are gone.
> 2) session terminates and greeter window never reappears. I am left with a
> black screen, and a blinking cursor going abnormally fast. The Ctrl-Alt-Fx
> keys do not work and the only possible option is to hit the reset button
> I'm not all that well versed on reading the logs but there are several
> errors present:
> lightdm user_get_uid assertion 'user != NULL' failed
> Error using VT_WAITACTIVE 7 on /dev/tty0: Interruped system call
> org.a11y.atspi.Registry XIO: fatal IO error 11
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