FB console is OK, when switching to VT7, there is no KDM prompt. Instead looping messages appear:
Failed to idle channel 1 0x2634 != chid: 0x00100001 PFIFO: unknown status 0x00000100 PFIFO - playlist update failed Failed to idle channel 2 ... Failed to idle channel 1 ...
http://img-fotki.yandex.ru/get/6400/31867379.3/0_a444b_12b9cdae_XL.jpg
Screen eventually blanks and can be restored back by pressing a key or moving mouse.
dmesg from working kernel (3.4.4)
[drm] nouveau 0000:01:00.0: Detected an NVc0 generation card (0x0c8300a1) [drm] nouveau 0000:01:00.0: Checking PRAMIN for VBIOS [drm] nouveau 0000:01:00.0: ... appears to be valid [drm] nouveau 0000:01:00.0: Using VBIOS from PRAMIN [drm] nouveau 0000:01:00.0: BIT BIOS found [drm] nouveau 0000:01:00.0: Bios version 70.10.27.00 [drm] nouveau 0000:01:00.0: TMDS table version 2.0 [drm] nouveau 0000:01:00.0: MXM: no VBIOS data, nothing to do [drm] nouveau 0000:01:00.0: DCB version 4.0 [drm] nouveau 0000:01:00.0: DCB outp 00: 02000300 00000000 [drm] nouveau 0000:01:00.0: DCB outp 01: 01000302 00020030 [drm] nouveau 0000:01:00.0: DCB outp 02: 04011380 00000000 [drm] nouveau 0000:01:00.0: DCB outp 03: 08011382 00020030 [drm] nouveau 0000:01:00.0: DCB outp 04: 02022362 00020010 [drm] nouveau 0000:01:00.0: DCB conn 00: 00001030 [drm] nouveau 0000:01:00.0: DCB conn 01: 00010130 [drm] nouveau 0000:01:00.0: DCB conn 02: 00002261 [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 0 at offset 0x6A28 [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 1 at offset 0x70DA [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 2 at offset 0x85AA [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 3 at offset 0x85B4 [drm] nouveau 0000:01:00.0: Parsing VBIOS init table 4 at offset 0x8828 [drm] nouveau 0000:01:00.0: Parsing VBIOS init table at offset 0x888D [drm] nouveau 0000:01:00.0: 0x888D: Condition still not met after 20ms, skipping following opcodes [drm] nouveau 0000:01:00.0: Detected 1280MiB VRAM (GDDR5) [drm] nouveau 0000:01:00.0: 512 MiB GART (aperture) [drm] nouveau 0000:01:00.0: 0 available performance level(s) [drm] nouveau 0000:01:00.0: c: core 50MHz shader 101MHz memory 135MHz voltage 913mV fanspeed 41% [drm] nouveau 0000:01:00.0: allocated 1280x1024 fb: 0x1e0000, bo ffff880235a03360 fbcon: nouveaufb (fb0) is primary device fb0: nouveaufb frame buffer device [drm] Initialized nouveau 1.0.0 20120316 for 0000:01:00.0 on minor 0