Bug 111685 - [Polaris 30] [Bisected] Kernel BUG during boot when amdgpu.dpm=0
Summary: [Polaris 30] [Bisected] Kernel BUG during boot when amdgpu.dpm=0
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: not set normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2019-09-14 09:18 UTC by Omar Emara
Modified: 2019-11-19 09:51 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Bisect log (2.79 KB, text/x-log)
2019-09-14 09:18 UTC, Omar Emara
no flags Details
Full log after the hang (91.38 KB, text/x-log)
2019-09-14 09:19 UTC, Omar Emara
no flags Details

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
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