Comment 79 for bug 1791312

I still have flickering problems with the X1300, kernel 5.4, Ubuntu 20.04.

$ lspci | grep Radeon
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV515/M52 [Mobility Radeon X1300]
$ uname -r
5.4.0-33-generic
$ lsb_release -r
Release: 20.04

The display is a laptop panel on a Dell Inspiron 6400.

$ xrandr
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
   1280x800 60.04*+

When the display wakes from sleep, it is "random" whether the flickering occurs or not.

My workaround: use xrandr to force mode switches until the flickering goes away. For example, run the following command one or more times:

$ xrandr -s 1 && xrandr -s 0