Bug#1112158: sway: System freeze after several hours with: Unsupported modifier, resource creation failed solution.

[Simon McVittie]

Control: retitle -1 sway: System freeze after several hours with: Unsupported modifier, resource creation failed
Control: reassign -1 sway

On Wed, 27 Aug 2025 at 09:39:30 +1000, JoE wrote:
>   System froze after running for several hours.
>Log shows error: "debian /usr/libexec/gdm-wayland-session[4073]: Unsupported modifier, resource creation failed." repeatedly.

It looks as though this error message is coming from the Wayland session 
that was run by gdm (which in this case seems to be sway) rather than 
from gdm itself, so I'm reassigning this to sway to start with. It might 
really be an issue in some lower-level component like wlroots or mesa.

>Aug 27 07:23:10 debian kernel: i915 0000:00:02.0: [drm] Found SANDYBRIDGE (device ID 0126) display version 6.00 stepping N/A

Is this the only GPU in this system: the Intel HD Graphics 3000 
integrated GPU that is built-in to a Sandy Bridge (Core 2xxx) CPU?

>Aug 27 08:00:16 debian /usr/libexec/gdm-wayland-session[1696]: 00:34:23.246 [ERROR] [wlr] [backend/drm/atomic.c:79] connector LVDS-1: Atomic commit failed: Device or resource busy
>Aug 27 08:00:16 debian /usr/libexec/gdm-wayland-session[1696]: 00:34:23.246 [ERROR] [sway/desktop/output.c:317] Page-flip failed on output LVDS-1

These messages from earlier in the session might also be relevant. They 
occur several times in the log.

>Aug 27 08:27:46 debian /usr/libexec/gdm-wayland-session[4073]: Unsupported modifier, resource creation failed.
>Aug 27 08:27:46 debian /usr/libexec/gdm-wayland-session[4073]: Unsupported modifier, resource creation failed.

These messages start about an hour after boot in the provided log, and 
continue, extremely frequently (many times per second), from that point. 
They come from the crocus or iris driver for Intel GPUs, which is part of 
Mesa (both drivers contain this message so I can't immediately tell 
which one was active on this system).

     smcv