[Bug 259670] graphics/drm-kmod: sporadic GPU hang with i915kms

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259670

Peter Much <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #19 from Peter Much <[email protected]> ---
I have a possibly related issue:

When switching between VTs with alt-Fx (not using X, X is idle on F9),
after some switch the screen shows a couple of

WARNING !drm_modeset_is_locked ...

as quoted above (but with a source path into /usr/ports)
and no further interaction is possible, hard poweroff necessary, i.e. no
crashdump.

I am using recent 13.1-STABLE 38fe63afdc9d (OSVERSION = 1301507) 
and ports from quarterly (drm-510-kmod-5.10.113_7)
on a Livebook A3511 (cpu i3-1115G4).

kldloaded modules:
vmm.ko
i915kms.ko
drm.ko
linuxkpi_gplv2.ko
dmabuf.ko
if_iwlwifi.ko

Settings:
compat.linuxkpi.i915_enable_dc=2
compat.linuxkpi.i915_enable_fbc=1

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