My machine has been getting stuck when rebooting during the current
3.9 cycle, and yesterday I took the time to bisect the problem to this
commit:
32256c87ead3edec86bed5023a0ff96a6d907931: drm/nouveau/fifo/nvc0:
improve interrupt handler somewhat
Logs extra info for interrupts that have a sub-status register, and
handles the "special" ack from INTR bit 31.
Signed-off-by: Ben Skeggs <bske...@redhat.com>
The symptom when rebooting is that the console starts spitting out a
continuous stream of identical messages like this (transcribed by
hand):
nouveau W[ PFIFO][0000:03:00.0] INTR 0x01000000: 0x00000005
The system is then unresponsive until it is reset. Just commenting
out the corresponding nv_warn() in
drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c is enough to allow the
system to reboot normally.
Video card in this system is (from lspci -v):
03:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce
GT 520] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. Device 2630
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at fa000000 (32-bit, non-prefetchable) [size=16M]
Memory at d8000000 (64-bit, prefetchable) [size=128M]
Memory at d6000000 (64-bit, prefetchable) [size=32M]
I/O ports at bc00 [size=128]
Expansion ROM at fbb80000 [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nouveau
Marc
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