AMD Ryzen 7040 Series, Linux Mint 22.1 Cinnamon, 6.8.0-78-generic kernel.
BIOS 3.16 was on 3.09.
Dual external Display port monitors are not working, I can only see 1 external monitor. So I decided to update the BIOS with LVFS. I did a “fwupdmgr refresh --force”, good so far. Then I did a “fwupdmgr get-updates” and suddenly the second monitor comes on, which was really weird. I go ahead and update the firmware with “fwupdmgr update” and after the reboot, the second external monitor no longer works again. Any idea how to get the third monitor working?
EDIT: Booting an Ubuntu USB 24.04.3 in tryout mode, both external monitors work.
Also verified that I do not have secure boot enabled.
X11 or wayland? Which kind of physical connection used for both displays? Any luck with
xrandr –auto #x11
?
Thanks for the response. I am using X11, the dual external monitors are connected with the stock display port adapters. Executing the example command you supplied had some sort of odd overlay effect with the built in laptop display.
I guess the overlay effect is that the display arrangement is messed up after issuing the command. Basically all display are positioned at 0/0 coordinates. When in this state try to use the DE’s (Gnome?) display arrangement feature to fix this. Usually this is saved across connect/disconnect of displays (unless using xrandr again).
It overlays the built in monitor and the one working external monitor, it has no effect on the other external monitor.