On Mon, 29 Aug 2011 21:06:29 +0200 Roberto Ragusa <mail@xxxxxxxxxxxxxxxx> wrote: > Hi, > > it sometimes happens to me that X completely locks up, while the > machine is still alive on the network. > > This is on F14, untainted kernel, nouveau driver, no 3D used, > KDE desktop on a 32-bit machine with 8GiB RAM and PAE kernel. > It typically happens when something is going to be drawn on > the screen (a window pops up or virtual desktop change). > > I would like to open a bug, but I'm not able to attach any kind > of usable log; dmesg says nothing, all I can say is that > the screen remains frozen (including the pointer), the X > server and the kernel keep doing some "SIG ALRM" stuff and > any attempt to access the X server stalls the command (xrandr > or xset, for example), in a Ctrl-C responsive way. > > Any idea? > I had this problem in F14 while using the stock kernel. When I compiled a custom kernel it went away. While I made *many* changes, I think the one that mattered was turning off SMP on my single core system. I suspect, without proof, that the SMP code was occasionally causing a race condition, and a deadlock. Other possible causes for fix: moved to pre-emptable desktop, reserved 128 K low memory for kernel, moved to deadline scheduler. You could open a bug against the kernel, but it has moved on so far that it will probably languish. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
