On 08/30/2011 09:24 PM, stan wrote: > 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. [now crossposting fedora, fedora-devel] Hmmm, turning off SMP is not realistic, as this laptop has a Core 2 Duo. I had been compiling my kernels until many years ago, and I would like to stay with the distro's kernel. I hope that upgrading to F15/F16 will mix things up and solve this in some way. Opening a bug seems a waste of time. I'm cross-posting to fedora-devel, in case someone can suggest how to collect useful info to open a kernel bug. Thanks. -- Roberto Ragusa mail at robertoragusa.it -- 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
