Red Hat Bugzilla – Bug 35919
rmmod of bttv in gnome crashes RH7.1 (seawolf)
Last modified: 2007-04-18 12:32:40 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.2.17-14smp i686)
when logging into a gnome desktop, there is a probe (might be done by X)
insmods or modprobes bttv. If bttv is rmmod'ed in gnome, everything totally
KDE is OK, if not logged in to desktop (i.e. gdm running, and you switch to
console) that's OK as well.
Steps to Reproduce:
1. login to gnome desktop
2.wait for the 10 minute "rmmod -as" - system will hang at that point.
3.or, manually rmmod bttv - again system will hang
Actual Results: bttv mod removes (according to the syslog), but system
Expected Results: system should not freeze
box is SMP, running seawolf. video card is a "Win TV"
contact me and I'll e-mail you a syslog. or anything else that is wanted.
seems like it is no really related to the bttv module unloaded as i've been
getting the same problem
while an es1370 is unloaded or the cdrom module is unloaded.
but it seems related to GNOME and having a bttv card.
I've tracked down some additional information.
1) this bug is desktop independent (also happens under KDE, also happens if you
do not login to a desktop)
2) this crash is due to the presence of the dolby sound chip on the
bt878 chip. For example, the Win-TV Theatre has a dpl 3518.c sound chip
improperly detected as a tda9840 sound chip. When bttv is rmmod'd it will
itself from the tda9840 module, and the kernel will panic. It seems that the
causes spurious interrupts that the kernel doesn't properly handle.