Mesa's New "Crocus" OpenGL Driver Is Performing Well For Old Intel Hardware

[frosth]

lorn10 , maybe try it another way.
Run environment with i965 driver and then run program with MESA_LOADER_DRIVER_OVERRIDE=crocus.
If you really want run environment on crocus you should compile mesa with "prefer-crocus=true" and set MESA_LOADER_DRIVER_OVERRIDE=crocus in /etc/environment or ~/.bash_profile this works on my dell.

don't know why prefer-crocus=true is not enough this is maybe bug or so
for now works great and even video-decode in firefox works (propably using i965 path)

[lorn10]

Thanks frosth for this alternative suggestion. Unfortunately I am as mentioned at a quite special Dual-GPU system. It is not possible to get the i965 driver working in conjunction with the R600 Gallium driver of my Radeon TURKS card. A necessary function is missing at the classic Intel i965 driver so I always get an error:

libGL error: Different GPU, but blitImage not implemented for this driver
libGL error: failed to load driver: i965

Source: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4368

So the only way to get this working is through the new Intel Crocus driver which implements the necessary libGL feature because it is an genuine Gallium driver.

[frosth]

lorn10, Try "prefer-crocus=true" + MESA_LOADER_DRIVER_OVERRIDE=crocus, then this should set crocus as default ogl driver for all.

[fingers crossed]

[lorn10]

Thanks again! Unfortunately also the "prefer-crocus=true" value shows no effect, I get still the same errors. Whatever, It looks that in my case the

libGL error: failed to create dri screen

seems to be the underlying issue and as a result I get then a:

libGL error: failed to load driver: crocus

So the crocus driver cannot be loaded at an quite early point.

However, the crocus driver is in an early stage, - maybe this will become better in the future. An if not, then I will place a bug report.

Full libGL verbose output:

test@test-iMac:~$ LIBGL_DEBUG=verbose glxinfo | grep direct
libGL: MESA-LOADER: dlopen(/usr/lib/x86_64-linux-gnu/dri/crocus_dri.so)
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.
libGL error: failed to create dri screen
libGL error: failed to load driver: crocus
libGL: MESA-LOADER: dlopen(/usr/lib/x86_64-linux-gnu/dri/crocus_dri.so)
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.
libGL error: failed to create dri screen
libGL error: failed to load driver: crocus
libGL: MESA-LOADER: dlopen(/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so)
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/test/.drirc: No such file or directory.