[Bug 213917] New: Screen starts flickering when laptop(amdgpu) wakes up after suspend.

[Bug 213917] New: Screen starts flickering when laptop(amdgpu) wakes up after suspend.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213917

            Bug ID: 213917
           Summary: Screen starts flickering when laptop(amdgpu) wakes up
                    after suspend.
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.13.6
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: utkarsh.naveen@gmail.com
        Regression: No

I have an ASUS FX505DT with an AMD Ryzen 3550H APU. This is not a new bug and
it was fixed in kernel v5.6 with commit hash:
eb916a5a93a64c182b0a8f43886aa6bb4c3e52b0


I haven't had the time to test out each of the kernel versions individually,
but this bug isn't there in Linux v5.12.6 and only appeared after I updated to
v5.13.5.


## Steps to reproduce
1. Let the laptop suspend.
2. Wake it up with some keypresses or something.
3. After waking up, the screen starts flickering on/off every second.

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[Bug 213917] Screen starts flickering when laptop(amdgpu) wakes up after suspend.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213917

Samuel Sieb (samuel-kbugs@sieb.net) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |samuel-kbugs@sieb.net

--- Comment #1 from Samuel Sieb (samuel-kbugs@sieb.net) ---
I've just run into this as well.  I upgraded the laptop to 5.13.12 and the
display doesn't resume properly as described.  The cpu is "AMD A10-9600P RADEON
R5".  The only relevant messages in the journal are 4 lines like: 
amdgpu 0000:00:01.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0000
address=0x10aa25720 flags=0x0070]
with a different value for address in each one.

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[Bug 213917] Screen starts flickering when laptop(amdgpu) wakes up after suspend.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213917

--- Comment #2 from Samuel Sieb (samuel-kbugs@sieb.net) ---
I just tried with 5.14.1 and resuming works again.  I still get those messages
in the log, so apparently they aren't relevant to this issue.

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[Bug 213917] Screen starts flickering when laptop(amdgpu) wakes up after suspend.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213917

kernel@mail.niknah.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kernel@mail.niknah.com

--- Comment #3 from kernel@mail.niknah.com ---
When I change the resolution or come back from suspend it flickers with random
dots.  https://youtu.be/9hXqSQjU080

It works again when I either switch the mode back to the old resolution or
press ctrl-alt-f8 & alt-f2

It's only a problem on the laptop eDP display, external usb-c display is ok.

In kernel 6.5.5, it goes away when I press ctrl-alt-f8 & alt-f2 or when I
switch the mode back.

In kernel 6.5.1, I couldn't fix it with ctrl-alt-f8 & alt-f2, it only goes away
when I switch back to the previous mode.

AMD Ryzen 7 4800U with Radeon Graphics

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