On Sat, Mar 03, 2018 at 06:24:55AM +0100, Jan Beich wrote:
Manuel Stühn <freebsdnew...@freenet.de> writes:

Hi,
the last drm-next-kmod worked fine on my Lenovo T420 with i5-2520M and
a HD Graphics 3000. After the update to the actual version (4.11) from
ports, I'm seeing regression in form of a very slow xfce4-desktop. The
slowness starts after some short time. Slow means for example that I
can type faster than the terminal prints the chars or when i move
windows they lag extremely behind the mouse's motion.

One entry in Xorg.0.log caught my attention:
[   128.266] (EE) intel(0): Failed to submit rendering commands (Bad
address), disabling acceleration.

Did you build xf86-video-intel with SNA option enabled or have
Option "AccelMethod" "SNA" in xorg.conf? If so see also

# pkg info xf86-video-intel-2.99.917.20180214 | grep -A2 Options
Options : SNA : off UXA : on # cat /usr/local/etc/X11/xorg.conf.d/driver-intel-mode.conf Section "Device"
       Identifier      "Intel Graphics"
       Driver          "intel"
       Option      "AccelMethod"   "sna"
       Option      "TearFree"   "true"
EndSection

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