On Sun, 2012-12-23 at 22:03 +0100, Willy Tarreau wrote: > Hi Jonathan, > > [ccing Paul for 2.6.34] > > On Sun, Dec 23, 2012 at 12:59:50PM -0800, Jonathan Nieder wrote: > > Hi Willy et al, > > > > Please consider > > > > f70e957cda22 x86: Don't use the EFI reboot method by default, > > 2011-07-06 > > > > for application to the 2.6.32.y and 2.6.34.y trees. The patch was > > applied upstream late in the 3.0 cycle, so newer kernels don't need > > it. > > > > In 2011, Keith Ward wrote[1]: > > > > > When attempting to reboot my my UEFI enabled system, the system hangs when > > > calling reboot requiring me to manually reset the system via the reset > > > switch. > > > > > > Screenshot: http://twitgoo.com/29bq1c > > > > Ben Hutchings writes[1]: > > > > > Version: 3.0.0-1 > > > > > > I also had this problem on my own system, but it is fixed now. > > > I bisected the fix to: > > > > > > commit f70e957cda22d309c769805cbb932407a5232219 > > > Author: Matthew Garrett <m...@redhat.com> > > > Date: Wed Jul 6 16:52:37 2011 -0400 > > > > > > x86: Don't use the EFI reboot method by default > > > > > > which is basically equivalent to the workaround! > > > > > > I'll also apply this fix to squeeze as it's so simple. > > > > Keith Ward also wrote[1]: > > > > > It seems as if this has recently been reported at Ubuntu's Launchpad as > > > well: > > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/721576 > > > > There are a variety of reports of the same panic at that bug on > > 2.6.32.y-, 2.6.38.y-, and 2.6.39-based kernels. Passing "reboot=a,w" > > on the kernel command line avoids trouble for reporters. > > > > Regards, > > Jonathan > > > > [1] http://bugs.debian.org/626022 > > Thanks for the detailed report. I'm queuing it now.
In 2.6.32 the relevant code is in arch/x86/kernel/efi.c. With the filename changed, the patch applies cleanly and works for me. Ben. -- Ben Hutchings One of the nice things about standards is that there are so many of them.
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