Comment 0 for bug 1859352

I've got a problem with some kernel modules (probably radeon) which cause screen problems. It occurs only on internal laptop screen.
I found that problem is present in all kernels released after 2019-06-09 18:25. Last kernel which works corectly is v4.19.49 2019-06-09 10:04. v5.2-rc4 2019-06-09 18:25 has this bug and also v4.19.50 2019-06-11 13:06. So I think there are some changes in all kernel packages between 10:04 and 18:25 that day (2019-06-09) casue future problems.

This may be problem with radeon modules cause screen goes strange when console shows "fb: switching to radeondrmfb from VESA VGA" (I remove "quiet splash" from GRUB menu).

In this video I show described problem -> https://player.vimeo.com/video/382017028

I've tested those kernels:

*Works correctly:
v4.19/ 2018-10-22 23:50
v4.19.49/ 2019-06-09 10:04
v5.0.1/ 2019-03-10 08:30
v5.0.7/ 2019-04-05 22:40
v5.0.21/ 2019-06-04 08:28
v5.1.6/ 2019-05-31 15:32
v5.1.8/ 2019-06-09 09:29

*Not working correctly
v4.14.163/ 2020-01-09 12:29
v4.19.50/ 2019-06-11 13:06
v4.19.94/ 2020-01-09 12:42
v5.0.0-37/ 2019-11-14 12:06
v5.1.9/ 2019-06-11 12:29
v5.1.10/ 2019-06-15 11:30
v5.1.11/ 2019-06-17 19:36
v5.2-rc4/ 2019-06-09 18:25
v5.2-rc5/ 2019-06-16 20:26

Quick Hardware info:
* Compal FL90
* CPU: Intel Core 2 Duo T7500
* GPU: AMD Rv620
* System Description: Ubuntu 18.04.3 LTS x64 (xubuntu)
* Kernel (works OK): 5.1.8-050108-generic #201906090832 SMP Sun Jun 9 08:35:40 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux