I just got hold of a brand new Lenovo p14s gen5 Ryzen 7 pro 8840HS with integrated 780 graphics.
At first I thought .. I don’t know what I thought really… anyways, the screen flickered at random intervals and rather infrequently too.
A quick search found a solution that works for me with my current configuration
$ uname -a
Linux toblakai 6.11.8-300.fc41.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Nov 14 20:37:39 UTC 2024 x86_64 GNU/Linux
$ lspci -n -n -k | grep -A 2 -e VGA -e 3
.
.
c4:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix3 [1002:1900] (rev d2)
Subsystem: Lenovo Device [17aa:50ef]
Kernel driver in use: amdgpu
The flickering might or might not have started after I ran fwupdmgr update which updated the Phoenix firmware..
.. in either case, it seems to have been solved by editing /etc/default/grub adding amdgpu.dcdebugmask=0x10 to the end of the GRUB_CMDLINE_LINUX line and then
$ grub2-mkconfig -o /boot/grub2/grub.cfg
$ reboot
As mentioned, this works for me. Supposedly it will hurt the battery life of the machine, but not by much.. and there are several reports of people that wasn’t helped by this fix .. so your mileage may vary.
‘till next time.