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Aka Yoga 7 Slim > > 14ILL11 or something like that. Also LENOVO_MT_83R0_BU_idea_FM_Yoga > > Slim 7 14ILL11. > > Linux version 7.4.0-rc2+ > > Ubuntu 26.04.01 LTS. > > Kernel config is copied from Ubuntu 26.04.01 LTS test kernel. > > Lots of ACPI errors in dmesg. > > > > Tried 7.3.something first, no NULL ptr dereferences, but it tried to > > talk with some ghost rt711-sdca chip, and the sound didn't work either. > > 7.2.x, there were some topology problems or something, apparently that > > was fixed in the tree. > > Not one I have seen before, could you re-try 7.3 but with this > patch added: > > commit e0cb731652a1bebf962086f17d1b7c9d060cb7d6 > soundwire: dmi-quirks: Disable ghost rt711 on Lenovo Yoga Slim 7 > > That should fix the ghost rt711 problem and would be good to see > if this is a regression. Pretty sure it is but probably makes > sense to confirm first. Having a look around, I also found this patch: https://lore.kernel.org/all/20261109102536.357134-1-ghidoliemanuele@gmail.com/ Which does sound like it fixes something that sounds very similar to this problem. So trying that patch on top of v7.4-rc2 is also probably a good idea. Thanks, Charles