https://bugzilla.kernel.org/show_bug.cgi?id=88921
Bug ID: 88921
Summary: System reboots upon suspending when Radeon 5770 card
is used
Product: ACPI
Version: 2.5
Kernel Version: 3.13.rc*
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Sleep-Wake
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 158831
--> https://bugzilla.kernel.org/attachment.cgi?id=158831&action=edit
lspci -v output
Hello,
I have a workstation with ASRock A785GXH/128M mainboad (latest BIOS) and Phenom
II X4 955 Processor, running Debian Unstable (amd64). It has an onboard IGP and
without an additional video card, this solution works just fine even with
recent kernels, i.e. S3 suspending/resuming works without any glitches.
The trouble starts when I add my Radeon 5770 video card. Prior to kernel
3.13.rc-something it worked OK, i.e. S3 suspend has put the system down, power
LED started blinking and after approximately 5 seconds the fans stopped (that
extra delay was always slightly different to Windows' but I didn't care much).
After the said version, the system has a different behavior. Instead of turning
off the fans, the whole system suddenly REBOOTS! In some of the latest versions
(maybe 3.16, not sure) the ~5s delay disappeared so the system now reboots even
sooner (*sic*).
The behavior is also slightly random: sometimes suspend did work once but the
next time it rebooted, sometimes even twice, but that lucky cases were rare and
not reproducible. The odds seem to vary with kernel versions but this is maybe
just imagination or some side effect from other software components (Xorg has
been upgraded in the meantime).
I tried to bisect the issue once before but the result was inconclusive,
probably because of the mentioned Heisenbug nature. I could narrow it down to a
potential range of commits but unfortunately one of them was a huge DRM code
update which caused lots of build errors and it was hard to follow.
I am not sure whether the delay happens with onboard video too but I could test
it if someone wants to know.
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