Red Hat Bugzilla – Bug 496293
GDM hanging on authentication right after login (with 2.6.29 kernel)
Last modified: 2009-12-18 04:16:19 EST
The 2.6.29 kernel upgrade has caused a GDM regression for me with F-10. This is on a T61 (nVidia Quadrio NVS 140M graphics chip). Booting with 2.6.27 doesn't trigger the problem.
The login process seems to hang right after entering the password. Using gdb to attach to the process, it seems /usr/libexec/gdm-session-worker crashed in the pam library during a realloc() call, seemingly because of a memory corruption issue. (realloc call at pam_modutil_getpwnam.c:41). The problem doesn't always occur, about 50% of the time.
Just to double check, do you also have the proprietary nvidia driver, or is this with an untainted kernel?
The problem occurs in both scenarios (with nv and nvidia).
Is there any way to run gdm-session-worker stand-alone with the right environment variables and arguments, which would give me a chance to run it under valgrind ?
I'm going to upgrade to F-11 fairly quickly, so I may not be able to reproduce this in the future...
The culprit is thinkfinger (my T61 has a fingerprint scanner). Its pam module is crashing during authentication from gdm-session-worker. Uninstalling thinkfinger fixed it.
(In reply to comment #4)
> The culprit is thinkfinger (my T61 has a fingerprint scanner). Its pam module
> is crashing during authentication from gdm-session-worker. Uninstalling
> thinkfinger fixed it.
I was afraid of this; I remember seeing thinkfinger being orphaned ( https://www.redhat.com/archives/fedora-devel-list/2008-December/msg00165.html )
I haven't noticed crashing, but on my machine, it just hangs for a while (as much as 30 seconds) before letting me in.
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