Il 25/06/2014 20:39, John Stultz ha scritto:
Public bug reported:
Running QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.1),
booting Linux kernels with qemu-system-x86_64 and qemu-system-i386, I no
longer see the system resume from suspend when an RTC alarm is set.
My simple test application can be found here:
https://github.com/johnstultz-work/timetests/blob/master/alarmtimer-suspend.c
Previously this worked w/ QEMU 1.5 (bascially up until I upgraded from
Ubuntu 13.10 to Ubuntu 14.04, which came with 2.0).
Ok, bisected. The first commit to break it is:
commit c046e8c4a26c902ca1b4f5bdf668a2da6bc75f54
Author: Michael S. Tsirkin <m...@redhat.com>
Date: Wed Sep 11 13:33:31 2013 +0300
piix4: disable io on reset
and the first commit to fix it is:
commit db76ec6291df8a03c2cc82ea1249049383cca392
Author: Gerd Hoffmann <kra...@redhat.com>
Date: Thu May 15 14:01:59 2014 +0200
seabios: update to 1.7.5-rc1
Yesterday I could not reproduce it because, even though Fedora has QEMU
2.0.0, it has already updated SeaBIOS to 1.7.5.
In fact, the fix is actually not in QEMU but rather in SeaBIOS:
commit 40d020f56226aee7c75a6c29f471c4b866765732
Author: Marcel Apfelbaum <marce...@redhat.com>
Date: Wed Jan 15 14:20:06 2014 +0200
resume: restore piix pm config registers after resume
Ubuntu can fix it by upgrading to SeaBIOS 1.7.5, or including this patch
in their package (untested, but looks pretty safe).
Paolo
