On Fri, Jul 18 2025 20:14:08 -0500, Mario Limonciello wrote: > OK, I think we need to do two things to figure out what's going on. > > 1) Let's shift over to 6.16-rc6. Once we've got a handle on the situation > there we can iron out if there are other patches missing or this is also > broken for you in 6.16. If it's not working as expected there either we > need it fixed there first anyway.
Same behavior on 6.16-rc6: brightness is set to 0 (max 399000), minimally visible. > 2) The starting brightness I don't expect to be "0". We need to see what > values were read out from the firmware. There is a debugging message we can > catch if you boot with drm.debug=0x106. Keep in mind you probably need to > increase log_buf_len if your ring buffer is set too small too. > > https://github.com/torvalds/linux/commit/4b61b8a390511a1864f26cc42bab72881e93468d > > PS: I would rather you add logs into a gist, pastebin or a bug somewhere if > you can. [ 3.210757] amdgpu 0000:03:00.0: [drm:amdgpu_dm_connector_late_register [amdgpu]] Backlight caps: min: 1000, max: 400000, ac 100, dc 32 full dmesg: https://termbin.com/o2q3 -- Lauri Tirkkonen | lotheac @ IRCnet
