Bug 111685

Summary: [Polaris 30] [Bisected] Kernel BUG during boot when amdgpu.dpm=0
Product: DRI Reporter: Omar Emara <mail>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: not set    
Version: DRI git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Bisect log
none
Full log after the hang none

Description Omar Emara 2019-09-14 09:18:25 UTC 
Created attachment 145359 [details]
Bisect log

To reproduce, pass the parameter amdgpu.dpm=0 to a kernel v5.2 or higher. The kernel will hang at boot. v5.1 boots correctly.

I have bisected the kernel between v5.1 and v5.2, the bisect log is attached below.

The last three lines from the log are as follow, the full log is attached below:

kernel: BUG: unable to handle page fault for address: ffff91fe41bdf5f8
kernel: #PF: supervisor read access in kernel mode
kernel: #PF: error_code(0x0000) - not-present page
Comment 1 Omar Emara 2019-09-14 09:19:42 UTC 
Created attachment 145360 [details]
Full log after the hang
Comment 2 Martin Peres 2019-11-19 09:51:22 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/906.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.