Re: [PROBLEM] Machine Freezes while Running Crossover Office

From: Kyle Moffett
Date: Sun May 29 2005 - 18:09:21 EST

On May 29, 2005, at 18:59:03, Linus Torvalds wrote:
On Sun, 29 May 2005, Pekka Enberg wrote:
The mouse cursor does not move and the screen does not refresh. The
machine locks up completely for few seconds (actually more like 5-10 s)
and then the system comes back up (after which it can be used normally).
I cannot even switch virtual consoles. Please note that I can
immediately reproduce the problem again as many times as I want by doing
the test scenario.

However, I don't understand how wine can block the X server from doing
even cursor updates. It might be a scheduler bug, of course. The one thing
a bigger pipe buffer does is end up changing scheduling behaviour.

(On the other hand, I would not be surprised if Wine does something that
makes X pause, like use DGA or whatever and tells X not to update the
screen, including cursors).

If the application captured the mouse/keyboard and did not pass them on to
X for some period of time, then X would appear to not respond to VT- switch
requests, because those keys go through the same handler loop (depending on
the way your X is configured, of course).

I've had incidents where a user forkbomb was able to hang X (and therefore
the console) while our SCHED_RR rate-limited SSH daemon was running fine
and able to successfully kill the process.

Kyle Moffett

Version: 3.12
GCM/CS/IT/U d- s++: a18 C++++>$ UB/L/X/*++++(+)>$ P+++(++++)>$
L++++(+++) E W++(+) N+++(++) o? K? w--- O? M++ V? PS+() PE+(-) Y+
PGP+++ t+(+++) 5 X R? tv-(--) b++++(++) DI+ D+ G e->++++$ h!*()>++$ r !y?(-)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at