[Bug 110135] [skl] GPU hang in sway, unknown cause

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110135

--- Comment #20 from emersion <contact at emersion.fr> ---
Hi, sway dev here. i915 devs: let me know if you need info about userspace.

Our DRM code behaves more or less like Weston, so I'm not sure what could be
wrong here.

However I see that the Intel card is card1 and there are nouveau logs. What is
your setup exactly? Is card0 a NVIDIA card? You could also e.g. run
https://github.com/ascent12/drm_info on your device to get information about
what cards are plugged in and what are their capabilities.

On multi-GPU setups we render on one primary GPU and use DMA-BUFs to copy
buffers from the primary GPU to the secondary one (we don't do direct scan-out
yet, this really is a copy).

If you could share sway debug logs (sway -d >sway.log 2>&1) that would help
figuring out the exact setup sway/wlroots runs on.

If you connect all monitors to one card, you could force sway/wlroots to use
only this card. This might or might not help, and will hide connectors of the
other cards. You can do so by exporting WLR_DRM_DEVICES=/dev/dri/card0 (or
card1).

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