https://bugzilla.kernel.org/show_bug.cgi?id=30052
--- Comment #8 from Antonov Nikolay ostinru@gmail.com 2011-03-01 06:35:19 --- kernel boots well without vgaswitcheroo, but radeon doesn't probe due to #15181
notebook ostin # dmesg |grep radeon [ 6.476805] [drm] radeon defaulting to kernel modesetting. [ 6.476807] [drm] radeon kernel modesetting enabled. [ 6.476854] radeon 0000:01:00.0: enabling device (0000 -> 0003) [ 6.476863] radeon 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 6.476868] radeon 0000:01:00.0: setting latency timer to 64 [ 6.546117] radeon 0000:01:00.0: Invalid ROM contents [ 6.546171] radeon 0000:01:00.0: Invalid ROM contents [ 6.546190] [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM [ 6.546192] radeon 0000:01:00.0: Fatal error during GPU init [ 6.546196] [drm] radeon: finishing device. [ 6.547337] radeon 0000:01:00.0: PCI INT A disabled [ 6.547346] radeon: probe of 0000:01:00.0 failed with error -22
and I need vgaswitcheroo, because ATI card consume much energy and notebook works 2-2.5 hours (in windows about 6 hours).