Samuel Čavoj [off-list ref] writes:
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This call to sysfb_disable() has been causing trouble with regard to
VFIO. VFIO has been calling aperture_remove_conflicting_pci_devices
to
get rid of any console drivers (d173780620792c) using the device in
question, but now even unrelated drivers are getting killed. Example
situation:
Which drivers do you use?
This happens with either no drivers loaded or the proprietary nvidia
driver. Nouveau is fine as it doesn't rely on efifb but brings its own.
Which is what all DRM drivers should do. If they want to make sure that a
fbdev will be present after the DRM driver probes, then should register an
emulated fbdev.
There was an attempt to workaround that in [0], in particular patch [1]
but that effort was not continued since the only DRM driver that would be
affected is the Nvidia proprietary driver that relies on efifb/simpledrm
to have a VT.
[0]: https://patchwork.kernel.org/project/dri-devel/list/?series=711019&archive=both
[1]: https://patchwork.kernel.org/project/dri-devel/patch/20230111154112.90575-11-daniel.vetter@ffwll.ch/
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat