[Bug 264206] graphics/drm-fbsd13-kmod: System panic setting sysctl hw.dri.0.vblank=1 - page fault (drm_vblank_info -> sysctl_root_handler_locked)
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Date: Wed, 25 May 2022 09:26:22 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264206
Emmanuel Vadot <manu@freebsd.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |Overcome By Events
CC| |manu@freebsd.org
Status|Open |Closed
--- Comment #3 from Emmanuel Vadot <manu@freebsd.org> ---
Your first problem is that you don't have the needed firmware, pkg install
gpu-firmware-radeon-kmod-caicos should fix the attach problem.
The second one is that somewhere in drm they leave some variable uninit and we
panic when we try to access them. This is fixed in 5.10 and tbh bisecting which
changed is needed to fix this in 5.4 is too complicated.
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