<div dir="ltr">Hi<div><br></div><div>I've done some more testing. The flashing I was seeing with Xserver 1.19.5 goes away when I use egl rather then glx with Kwin - I won't be using egl in any of the next tests</div><div><br></div><div>When I use Xserver 1.20 RC4 with Intel/AMDPGU DDXs Kwin doesn't start - the X server is running (I'm attaching logs) - that's the case whether compositing is enabled or not in Kwin</div><div><br></div><div>With the modesetting driver, Kwin launches with compositing enabled or disabled. However the lockups in plasmashell are still present. These happen with compositing enabled or disabled too. Simplest way to reproduce - press the start button multiple times until it locks up (usually within 4 times) - leaving it overnight, it seems to have unlocked itself. Alternatively "killall -9 plasmashell && sleep 1 && plasmashell" sorts it from "AltĀ + F2". I've attached the journal again just after a freeze (journalctl.freeze)</div><div><br></div><div>Cheers</div><div><br></div><div>Mike</div><br><div class="gmail_quote"><div dir="ltr">On Mon, 9 Apr 2018 at 11:07 Mike Lothian <<a href="mailto:mike@fireburn.co.uk">mike@fireburn.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Switching between egl and glx can only be done these days by editing the kwinrc file (egl however is used by default on wayland I believe), egl was still enabled from years ago when switching was easy<div><br></div><div>I've attached some coredumps on the bug, though I don't have any debugging compiled into the binaries so I'm not sure how useful they are</div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, 9 Apr 2018 at 10:45 Roman Gilg <<a href="mailto:subdiff@gmail.com" target="_blank">subdiff@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Sat, Apr 7, 2018 at 9:56 AM, Mike Lothian <<a href="mailto:mike@fireburn.co.uk" target="_blank">mike@fireburn.co.uk</a>> wrote:<br>
> Switching to glx from egl gets things started for me<br>
<br>
Do you mean switching from egl to glx as in switching the compositing<br>
backend? And it did not work with egl backend but with glx?<br>
<br>
The egl backend on X in KWin isn't supported well at the moment and<br>
switching between them shouldn't be possible anymore from the control<br>
module in system settings.<br>
<br>
Can you post a backtrace from the dying process? Is it KWin or<br>
Plasmashell? The one of Plasmashell in the Gentoo bug report is with<br>
an AMD card.<br>
<br>
Cheers<br>
Roman<br>
</blockquote></div></blockquote></div></div>