[Bug 91880] Radeonsi on Grenada cards (r9 390) exceptionally unstable and poorly performing

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changed bug 91880
What Removed Added
Status REOPENED NEEDINFO

Comment # 199 on bug 91880 from
Can someone please help the linux noob?

I am on fedora 28. my "GRUB_CMDLINE_LINUX=" looks like this:

BOOT_IMAGE=/boot/vmlinuz-4.16.7-300.fc28.x86_64 root=/dev/mapper/fedora-root ro
rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap rhgb quiet radeon.si_support=0
radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1 amdgpu.dc=1
amdgpu.dpm=1

i added the "amdgpu.dc=1 amdgpu.dpm=1"
when i start gnome there are 3 errors like this:

WARNING: CPU: 2 PID: 369 at
drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132
generic_reg_update_ex+0x12c/0x160 [amdgpu]

what parts of the grub-line do i need to add or delete to get things working,
fixed as suggested in this thread? do i still have the wrong kernel?

Thanks very much!!! I really try to make the switch to linux but the problems
with my ASUS R9 390 DirectCU III OC (and the bad performance) are a bit
annoying.


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