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[SOLVED] Machine hangs on booting when accessing AC'97

Linux Kernel, Network, and Services configuration.
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yossarian
Posts: 2
Joined: 2010-04-03 09:03

[SOLVED] Machine hangs on booting when accessing AC'97

#1 Post by yossarian »

Hello,

I am reasonably experienced in linux, but new to Debian. I have installed Lenny (v.5.0.4) on an old acer travelmate 220 which I have rescued from being thrown away. I don't expect much from it, but it will be good for backup/experimentation. I have a few issues when booting, one of which causes the machine randomly to hang on about every third boot, which is the problem that has brought me here. I am wondering whether there is any configuration option / boot parameter to prevent it. I will quote all the boot messages which might be relevant, although I am guessing that only the last ones are important. I am typing what I see, so any differences from actual formatting on screen are due to that.

Boot begins normally then :
[0.153630] pnp 00.01: can't add resource for IO 0x57b0-0x57bb
Loading please wait. . .
Some messages here - no apparent problems
Waiting for /dev to be fully populated ... [10.964803] acer-wmi: No or unsupported WMI interface, unable to load
[14.700325] AC'97 0 access is not valid [0xffffffff], removing mixer.
[14.700406] Unable to initialize codec #0
[15.723168] codec_read 1: semaphore is not ready for register 0x54
At this point the machine freezes. I have to remove the battery to force the reset.

lspci output includes "00.1f.5 Multimedia audio controller. Intel Corporation 82801CA/CAM AC'97 Audio Controller (rev 02)"

Googling throws up a few references to "AC'97 0 access is not valid [0xffffffff], removing mixer", but I have not found any which involve the machine hanging.

Whilst the hang is the main problem, it would also be tidy to stop the search for the WMI interface, which will never be found, and to know the significance of that first "can't add resource for IO" .. message.

TIA

Edit : I have found this post (waiting for /dev to be fully populated hangs), under Hardware here, which seems to be much the same thing. No solution was posted.
Last edited by yossarian on 2010-04-05 19:27, edited 1 time in total.

yossarian
Posts: 2
Joined: 2010-04-03 09:03

Re: Machine hangs on booting when accessing AC'97

#2 Post by yossarian »

Answering my own post, in case anybody finds it on a search. I don't think that sound is ever going to work, and the hangs were too frequent for the box to be usable. I blacklisted kernel autoloading of snd-intel8x0, using the procedure descirbed here http://wiki.debian.org/KernelModuleBlacklisting, which means that I can now boot cleanly.

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