[Bug 249922] graphics/drm-kmod is not stable with "AccelMethod" "sna" (Intel GM45 Express Chipset)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249922

--- Comment #3 from jakub_lach at mailplus.pl ---
(In reply to Niclas Zeising from comment #1)

In reply to Jan Beich from comment #2)

Sorry for the missing info, 

FreeBSD 12.2-STABLE #0 r366183 amd64

$ pkg info *kmod*                                                       
drm-fbsd12.0-kmod-4.16.g20200221
drm-kmod-g20190710
gpu-firmware-kmod-g20200920

$ pkg info *intel*                                                      
libva-intel-driver-2.4.1
xf86-video-intel-2.99.917.909,1

SNA was very much usable for me (ioquake3 and glxgears ran fine, glxgears quite
faster) since trying newer driver (thanks!), but graphical glitches in Firefox
(file save menu) and LibreOffice just proved to be too much in the long run. 

I will try SNA with graphics/drm-current-kmod, thoght iirc it was the same
behaviour. 

Regarding modesetting, should I just set Driver "modesetting"? If I understand
correctly, it does not use intel driver, so what I would achieve by that?
Should I test that?

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