epic or partial fail of user switching: crash (nvidia) or works only each 2nd or 3rd time (intel gfx)

[LimCore]

Two verified test cases:

a) ubuntu 8.10 with nvidia gfx, gnome, with 3d effects, - when switching user then computer freezes, it looks a lot like bug##88152

b) ubuntu 8.10 with intel gfx, gnome - this is probably SEPARETE bug:
- when using the applet, selecting an user, then it blinks screen (as if changing VT) and then says it fails. repeat 2-3 times and it usually works out eventually

- when I tried the Switch User from the screen-locked dialog (default screen lock) then it didn't worked at all saying that there was X error

/var/log/Xorg.20.log is attached, ends quickly with

 X.Org Server Extension : 1.1
 X.Org Font Renderer : 0.6
(II) Loader running on linux
(++) using VT number 8
Fatal server error:
xf86OpenConsole: VT_WAITACTIVE failed: Interrupted system call

/var/log/Xorg.21.log is attached, ends with

(**) Macintosh mouse button emulation: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
(II) AT Translated Set 2 keyboard: Device reopened after 10 attempts.
(II) Video Bus: Device reopened after 10 attempts.
(II) intel(0): xf86UnbindGARTMemory: unbind key 5

---------------------------------------------------------

both are 64 bit systems

xorg is up to date (1:7.4~5ubuntu3)

[LimCore (limcore)]

Xorg.21.log attached too

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:

 * Is this reproducible?
 * If so, what specific steps should we take to recreate this bug?
 * Could you describe one bug by bug report?

 This will help us to find and resolve the problem.

[Sebastien Bacher (seb128)]

Could you try on jaunty?

[Sebastien Bacher (seb128)]

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and don't hesitate to submit bug reports in the future.

[LimCore (limcore)]

Switching desktops still fail in 9.04 amd 64, although in far less epic manner.

Now the problem seems to appear only when I use 2 displays (Xinerama), and the problem is a crash.

Note sure if that is identical bug or not?

in xsession errors:
Xlib: extension "RANDR" missing on display ":20.0".
Xlib: extension "XFree86-Misc" missing on display ":20.0".
Xlib: extension "XFree86-Misc" missing on display ":20.0".

before crash, and on crash I got:

<unknown>: Fatal IO error 11 (Resource temporarily unavailable) on X server :20.0.
konsole(713) Konsole::SessionManager::~SessionManager: Konsole SessionManager destroyed with sessions still alive
x-session-manager: Fatal IO error 11 (Resource temporarily unavailable) on X server :20.0.
gnome-settings-daemon: Fatal IO error 11 (Resource temporarily unavailable) on X server :20.0.
Window manager warning: Fatal IO error 11 (Resource temporarily unavailable) on display ':20.0'.
nautilus: Fatal IO error 11 (Resource temporarily unavailable) on X server :20.0.

amd64 ubuntu 64bit, nvidia card 01:00.0 VGA compatible controller: nVidia Corporation GeForce 8600 GT (rev a1)

cat /etc/X11/xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildd@crested) Sun Feb 1 20:25:37 UTC 2009

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
# ...

[Sebastien Bacher (seb128)]

the issue is an xorg crash there...

[bugbot (bugbot)]

This bug report was filed against an old version of Ubuntu.
Can you confirm whether this is still an issue in natty?

If you don't mind, it would be very helpful if you could update the bug
report in launchpad to 'Fix Released' if it is no longer an issue for
you, or if it is still occurring under natty, please tag the bug 'natty'
so it's easier for us to track.

[bugbot (bugbot)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.