07:23 apteryx: hi there! I'm trying to understand why graphics are about twice as slow on an X200 when using Guix vs when using ZenLake (Ubuntu 26.04 derivative). It looks like on Guix the software renderer may be in use, despite Mesa providing the i915/crocus drivers. How can I verify which driver is in use?
07:35 apteryx: setting LIBGL_DEBUG=verbose does not reallyyield any clue, outside perhaps "screen 0 does not appear to be DRI3 capable"
07:37 apteryx: 'lspci -k' reports that the kernel driver in used for the Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) is 'i915'
07:38 apteryx: any way to cause mesa to print which userspace driver is chosen/used?
07:44 apteryx: glixinfo | grep device -> 'Device: llvmpipe (LLVM 18.1.8, 128bits) (0xffffffff)
07:44 apteryx: that means it's rendering via the llvmpipe software renderer, right?
07:46 apteryx: yeah, 'vulkaninfo --summary' is more explicit: "driverInfo = Mesa 26.0.2 (LLVM 18.1.8)"
07:50 apteryx: the build log for the current mesa in Guix can be seen at https://paste.guixotic.coop/mesa.log.gz.html, in case you'd like to review the configure output/summary