Re: drm-next-kmod regression

On Sat, Mar 03, 2018 at 06:24:55AM +0100, Jan Beich wrote:
>Manuel Stühn <freebsdnewbie_at_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