[Bug 325133] [NEW] [fglrx] Kernel freeze when fast-user-switching

[Gabriel M.]

Public bug reported:

Binary package hint: fast-user-switch-applet

Using Fast user switching or the Guest account produces a blank screen
with a complete kernel freeze (Alt+SysReq+REISUB doesn't work). I have
the fgrlx driver and compiz on default settings (this is a fresh install
of Intrepid 32 bits, actually.)

This kind of bug can easily destroy your OS and/or your data (imagine
trying fast user switching right after working on a university paper for
an hour and forgetting to save).

No really, Ubuntu developers, you should issue a huge (security?)
advisory and do something to protect one third of your users, like,
right now. But why did the bug happen in the first place? Don't you have
an automated test suite that clicks buttons and tries all the *basic
stuff* on several platforms after every package change, before releasing
software on the unsuspecting public? If not go ask Google how they do it
for Google Chrome. It would also help with errors such as last time's
funny mistake when legions of users were left with a computer that
wouldn't boot.

Instead of waiting for AMD (sorry, they are bigger players than you, you
have to adjust to them and not the contrary), it might be worth putting
a workaround in the fast user switching code or X server to try and
avoid the function calls that trigger the problem. Could it be the case
that other distros use the same driver and don't get the bug?

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 8.10
NonfreeKernelModules: fglrx
Package: fast-user-switch-applet 2.24.0-0ubuntu6
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=fr_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: fast-user-switch-applet
Uname: Linux 2.6.27-11-generic i686

** Affects: fast-user-switch-applet (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug

-- 
[fglrx] Kernel freeze when fast-user-switching
https://bugs.launchpad.net/bugs/325133
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