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Old 10-05-2019, 09:00 AM   #1
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Mesa HW-Acceleration on Pi 4


I've just installed my new Pi 4 with slackwarearm-current and everything seems to work fine. What I'm not able to do is to activate HW-Acceleration under X11. glxinfo shows that I'm using llvmpipe renderer which means (unaccelerated) software rendering. The driver (Broadcom v3d) seems to be compiled into mesa but isn't used. Do I need something else to enable it under Slackware?
Old 10-06-2019, 04:17 AM   #2
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I see kodi linux and debian are producing versions for the Pi 4, so I presume the Mesa driver works. Firmware? Presuming that's ok, and your kernel support is there, it should work. Check /var/log/Xorg.0.log.
If there's no /var/log/Xorg.0.log, I would temporarily hack /etc/inittab, set 'initdefault' to 3 instead of 4, and reboot. You'll get a console login. I presume there's not much logging done on the Arm, so run startx >x.log 2>&1 and you'll have it in x.log.
If you're using slackwarearm-current, be aware that Mesa has gone over to some crazy way of building Mesa starting on v19.0. It's a bit like cmake, except worse. Alien Bob has a script that pins everything down, but it builds ALL the drivers. It may be more discriminating on an arm build. You could probably save some space by just getting it to load your drivers, which would mean a recompile.


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