On the Dell Vostro 3550, for which info is already attached, the ACPI call \_SB.PCI0.PEG0.PEGP._OFF successfully disables the onboard radeon card, or at least claims to and reduces power use dramatically.
After this acpi call is made, there's about a 10 second delay during resume from sleep as the radeon driver hunts around for the card. It looks like the intel video bios doesn't like the card disappearing either, complaining: [ 238.692874] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 238.692878] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CCB4 (len 62, WS 0, PS 0) @ 0xCCD0 [ 238.692881] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing B9C8 (len 1036, WS 4, PS 0) @ 0xBAC5 [ 238.692884] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing B95E (len 76, WS 0, PS 8) @ 0xB966 then repeatedly [ 244.058077] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 244.058080] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing CCB4 (len 62, WS 0, PS 0) @ 0xCCD0 .... so be careful when turning off secondary video hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/752542 Title: ACPI DSDT info To manage notifications about this bug go to: https://bugs.launchpad.net/lpbugreporter/+bug/752542/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
