Hi Something has changed between rc1 and rc2 I can get kwin to start if compositing is off or xrender with the modesetting driver, if it's on X appears to start but doesn't show anything I can't however get it to start at all with xf86-video-intel and xf86-video-amdgpu (PRIME system) I'll attach the logs
Created attachment 138502 [details] Xorg.0.log with intel & amdgpu DDXs
Created attachment 138503 [details] Xorg.0.log with modesetting DDX
Created attachment 138504 [details] Dmesg
Created attachment 138505 [details] journalctl
This was with git master as I noticed it had a fix for dmabuf Could this be a PRIME issue? Is there anything I could attempt before doing a bisect?
Noticed this when starting steam: /home/fireburn/.local/share/Steam/ubuntu12_32/steam: symbol lookup error: /usr/lib/libGL.so.1: undefined symbol: xcb_dri3_get_supported_modifiers
Never mind I just needed to delete the steam version of libxcb-dri3
So I've bisected the issue back to: commit abb9b58d1af9a0286162e52ef9db390d0c950fc1 Author: Thierry Reding <treding@nvidia.com> Date: Fri Mar 16 14:24:21 2018 +0100 present: Advertise protocol version 1.2 Everything is implemented to support protocol version 1.2. Make it official. Reviewed-by: Daniel Stone <daniels@collabora.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Emil Velikov <emil.velikov@collabora.com> Reverting this allows Kwin to start I think more accurately 6a5d51e0823b43280e3646b7a0c919a3b76146ea isn't working with kwin
I've raised a bug with the KDE folk, I've tried the latest master and it still doesn't work without the revert of abb9b58d1af9a0286162e52ef9db390d0c950fc1
Created attachment 138619 [details] Coredumps
Is it any better with master now, 99f9b077c62e14ba955b9c1f7afda47f7799d317
Nope still not working Intel DDX didn't launch, Modesetting did however compositing was disabled due to the previous failure. Upon reenabling the screen went blank, however things were still running, when I went to the top left corner I could see the window titles, then the outline of the kicker menu too This is what I think I was seeing before Are you sure you're testing kwin with compositing enabled? System Settings > Display and Monitor > Compositor It'll warn you if it's been disabled
According to Mike on the mailing list the problem with KWin not starting went away when he removed an old config key that enforces the OpenGl EGL on X backend on KWin. This backend is basically unsupported nowadays in KWin and therefore enforcing its usage is discouraged. But as in this case the config key might be left over from before we removed the option in UI to select it. Therefore I created a patch downstream to ignore such a left-over config key in the future: https://phabricator.kde.org/D12066
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