https://bugs.freedesktop.org/show_bug.cgi?id=57349
Priority: medium Bug ID: 57349 Assignee: dri-devel@lists.freedesktop.org Summary: [nouveau, EFI] xf86-video-nouveau-1.0.2 and above fail to find device with X 1.13.0 Severity: normal Classification: Unclassified OS: Linux (All) Reporter: bonbons67@internet.lu Hardware: x86-64 (AMD64) Status: NEW Version: XOrg CVS Component: DRM/other Product: DRI
Commit 2f48b8f462a03cb92db9e9a7ae1957eb27473965 "nouveau: add platform bus support" added in -1.0.2 prevents X from starting on a MacBookAir booted via EFI.
As debugged on IRC with airlied, the cause is that kernel reports "boot_vga" being "0" for the GeForce 9400M (C79) when efifb is not being used (not compiled into kernel whereas nouveau is). [booting with efifb built-in causes "boot_vga" to be "1"]
When there is no other GPU around and KMS (+ fbcon) is active on that GPU X should accept it as well (or kernel adjust boot_vga as needed even while efifb is not compiled in/used).
Kernel used if 3.7-rc5 (with efifb disabled), 3.7-rc6 (with efifb built-in)