[bug report]: Black screen in 5.10

[Klaus Kusche]

Hello,

On 17/12/2020 16:17, Alex Deucher wrote:
> On Thu, Dec 17, 2020 at 10:15 AM Klaus Kusche
> <klaus.kusche at computerix.info> wrote:
>> With kernel 5.10.x, both the internal notebook display and any external screen
>> become black (or go to the "off" state?) when the kernel boots
>> (one or two seconds after the VGA text console is shown),
>> and the system no longer reacts.
>>
>> 5.9.x is fine.
>>
>> This seems to happen as soon as the amdgpu kernel driver loads/initializes,
>> even in pure text mode (VGA console or framebuffer), without starting X.
>>
>> Dell Precision notebook with
>> AMD Radeon (TM) Pro WX 3200 Series (POLARIS12, DRM 3.39.0, 5.9.15-gentoo, LLVM 11.0.0) (0x6981)
>>
>> Tried all combinations of DC/non-DC, FB/non-FB kernel configurations
>> (even happens when configuring Amdgpu without framebuffer!).
> 
> I think this may be the same issue as:
> https://patchwork.freedesktop.org/patch/408230/
> Does the patch there help?  It's already on it's way upstream.
The patch fixes it. 5.10.1 works fine for me now.

Will 5.10.2 contain the patch or shall I skip 5.10.2 ?

-- 
Prof. Dr. Klaus Kusche
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