Hi Thomas, please open up a bug report on http://bugs.freedesktop.org/. If this worked on an older kernel version bisecting would be a good idea as well. Regards, Christian. Am 24.09.2017 um 12:26 schrieb Thomas Meyer: > Hi, > > while trying to resurrect my old Macbook as an 32 bit kernel testing device, > I think someone broke the radeon driver on this first generation pure EFI boot > Macbook. > > My guess would be that the introduction of the vga_switcheroo code did break the > radeon_get_bios functionality. > > I will try again without radeon_atrm_get_bios and radeon_acpi_vfct_bios. > > kind regards > thomas