I realise this error might not be related to NixOS itself but thought I’d start here for some troubleshooting advice.
I’m running the latest NixOS unstable with sway 1.8/wlroots 1.15.1, and getting the following error logged by sway when trying to run
gammastep -O 3500K:
00:39:25.833 [ERROR] [wlr] [backend/drm/legacy.c:221] Failed to set gamma LUT on CRTC 80: Function not implemented
Nothing related shows up in dmesg.
I’m booting with the
i915.force_probe kernel parameter set as described here.
Not sure how to start narrowing down which part of the stack is responsible for this issue, any advice would be much appreciated. Does i915 just not support gamma LUT setting on this device at all?
lshw -c display output in case it is helpful:
*-display description: i915drmfb physical id: 2 bus info: pci@0000:00:02.0 logical name: /dev/fb0 version: 0c width: 64 bits clock: 33MHz capabilities: pciexpress msi pm bus_master cap_list rom fb configuration: depth=32 driver=i915 latency=0 mode=2256x1504 visual=truecolor xres=2256 yres=1504 resources: iomemory:600-5ff iomemory:400-3ff irq:201 memory:605c000000-605cffffff memory:4000000000-400fffffff ioport:3000(size=64) memory:c0000-dffff memory:4010000000-4016ffffff memory:4020000000-40ffffffff