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@lists.freedesktop.org Reporter: Heiko.Lechner@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?