[Bug 254190] graphics/drm-kmod: I get corruption at the top of all of my consoles

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254190

--- Comment #5 from Jan Beich <jbeich at FreeBSD.org> ---
Is this a regression? Does it work fine on Linux? Are other display servers
affected (kmscube, wlroots, arcan)?

Maybe try playing with (reserved) onboard video memory in BIOS, disabling
framebuffer compression (compat.linuxkpi.i915_enable_fbc=0 in
/boot/loader.conf) or switching from modesetting (builtin generic DDX) to
xf86-video-intel then enable SNA+DRI3.

"Got stolen memory" is normal behavior on Intel iGPUs, see
https://github.com/freebsd/drm-kmod/blob/drm_v5.4.92_1/drivers/gpu/drm/i915/gem/i915_gem_stolen.c#L21-L29

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