[Bug 7939] Hang while loading snd-nm256 module

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Ubuntu | linux


mdz at ubuntu.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jdthood at yahoo.co.uk,
                   |                            |crimsun at fungus.sh.nu
         AssignedTo|debzilla at ubuntu.com         |fabbione at ubuntu.com
          Component|hotplug                     |linux
          QAContact|                            |kernel-bugs at lists.ubuntu.com
            Summary|hotplug locks up machine    |Hang while loading snd-nm256
                   |                            |module




------- Additional Comments From mdz at ubuntu.com  2005-03-20 17:57 UTC -------
Did you try "noapic"?

Judging by the order of the devices on your PCI bus, the hang is occurring when
loading the driver for this device:

0000:01:00.1 Multimedia audio controller: Neomagic Corporation NM2200
[MagicMedia 256AV Audio] (rev 20)
	Subsystem: Gateway 2000: Unknown device 3300

This device is handled by the snd-nm256 (ALSA) and nm256_audio (OSS) modules,
and nm256_audio is blacklisted by alsa-base, so snd-nm256 seems likely to be the
module where the hang is occurring.

You should be able to test this hypothesis by adding snd-nm256 to
/etc/hotplug/blacklist (which will prevent it from being loaded by default). 
The system should boot normally, and should hang when you "sudo modprobe snd-nm256".

The next step is to get a trace from the hang, using the instructions at
http://www.ubuntulinux.org/wiki/DebuggingSystemCrash

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