Comment 332 for bug 1776563

guys the fix is coming in linux 5.1-5.2 its an amd display code bug,if
you want enable software cursor in xorg and the problem goes away

On 9/3/19 12:26 π.μ., mprotic wrote:
> Yes, I tried:
>
> "text ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 radeon.modeset=0
> amdgpu.runpm=0"
>
> "text ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 clocksource=hpet
> iommu=on amd_iommu=on amdgpu.dc=1"
>
> "idle=nomwait iommu=pt amd_iommu=on rcu_nocbs=0-7 pcie-aspm=off
> ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 amdgpu.dc=1"
>
> ...
>
> Tried 5.0 mainline kernel also, same result, suspend works, but graphics
> is slow and bumps cpu on system monitor to 10-50% just for moving
> windows in gnome, unlike pci=noacpi when cpu never goes anywhere near
> 10% for usual DE manipulations.
>
> Also if run with ivrs_ioapic params, switcheroo service fails with
> message "switcheroo-cont[3648]: switcheroo-control could not query
> vga_switcheroo status: Operation not permitted". This might be
> interaction with this secure boot bug:
> https://bugs.launchpad.net/ubuntu/+source/switcheroo-
> control/+bug/1768988
>
> BTW if I disable secure boot it doesn't boot at all with ivrs_ioapic
> params set.
>