https://bugs.freedesktop.org/show_bug.cgi?id=91841
Bug ID: 91841
Summary: Juniper 5770 entering Hibernate crashes the system
(instant reboot)
Product: DRI
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: critical
Priority: medium
Component: DRM/Radeon
Assignee: dri-devel at lists.freedesktop.org
Reporter: Heiko.Lechner at ruhr-uni-bochum.de
Created attachment 118037
--> https://bugs.freedesktop.org/attachment.cgi?id=118037&action=edit
grep(ed) drm out of dmesg
Hi!
I'm running Lubuntu 15.04 with open source radeon driver.
Hibernating with systemd crashed, so I read this guide:
https://www.kernel.org/doc/Documentation/power/basic-pm-debugging.txt
# echo freezer > /sys/power/pm_test
# echo platform > /sys/power/disk
# echo disk > /sys/power/state
worked
# echo devices > /sys/power/pm_test
# echo platform > /sys/power/disk
# echo disk > /sys/power/state
crashed
so according to the guide it seemed to be a driver issue.
I started in recovery mode (command line) and pm_test worked as far as core- so
hibernate worked.
The modules that are only loaded during "normal" boot are:
cfg80211
amdkfd
amd_iommu_v2
radeon
Even without cfg80211 hibernate crashes the system, so only radeon is left.
So I booted with radeon.modeset=0 kernel parameter resulting in radeon not
loading at all- but _hibernate works_!
Then I booted with radeon.dpm=0 kernel parameter resulting in
power_method=profile and profile set to default but hibernate does not work and
crashes.
For me it is obvious that this behavior is triggered by radeon driver.
What can I do next?
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