Arch Linux

ikidd

Member

Registered: 2018-01-15

Posts: 27

AMDGPU driver and Radeon 7770

I have the above card in addition to an AMD 560 in my computer.  With the last update, I had issues that eventually resulted in block device errors that necessitated blowing out the partition and reinstalling, which I did.  I have 6 monitors, 3 on the 7770 along the top, and 3 on the 560 along the bottom.  After reinstall, the 560 monitors are all fine, but I can't go above 1400x1050 on the monitors on the 7770 (which was not the case before).

I've blacklisted the radeon driver and added the kernel parameters for Sea Island into grub (radeon.si_support=0 amdgpu.si_support=1), and lspci -v seems to indicate both cards are using AMDGPU, but I still cannot go to the max res of 1680x1050 that these monitors support on the 7770 bank.  If I do, the wallpaper and any window that renders on one of those monitors comes up very messed up, though the mouse pointer looks fine on it.

I'm using Plasma but I don't recall configuring anything special for the DE before to make this work.  It's been a few years since I first installed this system and I had no way to recover any of the system files so I could go poking around in them.

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 15,526

Re: AMDGPU driver and Radeon 7770

For clarity : you have 2 discrete cards , a RX 560 and a Radeon 7770 ?

post pacman -Qs xf86-video output please.
Also xorg log and xrandr output.

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Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky