Bug 213917

Summary:	Screen starts flickering when laptop(amdgpu) wakes up after suspend.
Product:	Drivers	Reporter:	Utkarsh Verma (utkarsh.naveen)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	NEW ---
Severity:	normal	CC:	kernel, samuel-kbugs
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	5.13.6	Subsystem:
Regression:	No	Bisected commit-id:

Description Utkarsh Verma 2021-07-30 01:10:35 UTC

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.

Comment 1 Samuel Sieb 2021-09-09 03:56:17 UTC

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.

Comment 2 Samuel Sieb 2021-09-09 18:41:57 UTC

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.

Comment 3 kernel 2023-10-05 05:28:35 UTC

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