Description of problem:
I'm using Fedora 28 beta, with updates. I've a number of problems under wayland:
1. from time to time (e.g. each minute), mouse pointer freezes for a while (e.g. under 1 second) and then jumps to the new position when moving.
2. Kernel prints the following error repeatedly:
kernel: ACPI: \_SB_.PCI0.PEGP.DGFX: failed to evaluate _DSM
3. From time to time, when I press a key (or a key combination), it happens multiple times; e.g. I press Ctrl+T in gnome-terminal, and suddenly 3 new tabs open rather than just one.
It doesn't happen under Xorg.
I can reproduce this issue too. It is a clear regression from Fedora 27. See also bug #1565931.
(In reply to Hedayat Vatankhah from comment #0)
> Description of problem:
> I'm using Fedora 28 beta, with updates. I've a number of problems under
> 1. from time to time (e.g. each minute), mouse pointer freezes for a while
> (e.g. under 1 second) and then jumps to the new position when moving.
> 2. Kernel prints the following error repeatedly:
> kernel: ACPI: \_SB_.PCI0.PEGP.DGFX: failed to evaluate _DSM
This does not happen on my machine. I guess it is unrelated.
> 3. From time to time, when I press a key (or a key combination), it happens
> multiple times; e.g. I press Ctrl+T in gnome-terminal, and suddenly 3 new
> tabs open rather than just one.
I'm seeing this one too.
What kind of laptop is this reproducing on? Does https://copr.fedorainfracloud.org/coprs/jadahl/mutter-hw-cursor-on-demand/build/758884/ improve the situation?
(In reply to Jonas Ådahl from comment #2)
> What kind of laptop is this reproducing on?
In my case this is a desktop PC with Intel's core i5-650 and a H55 mainboard controller. I'll thy the build on the weekend.
Jonas, your mutter-hw-cursor-on-demand copr does seem to improve the input responsiveness / cursor lag for me on F28.
However, in my casual observations, I have seen an increase in a 'flickering' problem. The flickering doesn't start right away - it seems to start after my screen has locked and I unlock it (but not necessarily the first lock/unlock cycle).
Note that I have seen this flickering before on F27, but I think this is the first time I've seen it on F28 / Gnome 3.28. Because it's hard to describe the flickering, I made a video. It's kind of large (80MB) though.
The key repeats are tracked in bug #1579859.
I think the lags are duplicates of bug #1575281 and bug #1563811.
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