Comment # 7 on bug 1177384 from Takashi Iwai

Thanks.  Unfortunately there seems no obvious errors relevant with that through
a quick glance.

To check whether it's a regression in radeon kernel module or not, could you
try the following as root?

% mkdir /lib/modules/5.3.18-lp152.44-default/extra
% cp
/lib/modules/5.3.18-lp152.36-default/kernel/drivers/gpu/drm/radeon/radeon.ko
/lib/modules/5.3.18-lp152.44-default/extra/
% depmod 5.3.18-lp152.44-default
% mkinitrd

Basically this copies the old radeon module onto the new kernel.
Then reboot and retest with *.44 kernel.  If this works, it's a regression in
radeon driver.  If this doesn't fix, it's something else (likely in drm core
modules).  You can do similar tests by copying drivers/gpu/drm*.ko files, too.