Comment 7 for bug 350436

Revision history for this message
Paul Gortmaker (paul-gortmaker) wrote : Re: [Bug 350436] Re: acx wireless kernel panic in gutsy 8.10

On Sat, Apr 11, 2009 at 11:03 AM, Brad <email address hidden> wrote:
> Paul,
> Is there anyway to unload this module from the bootloader or something? I would love to at least, temporarily disable the driver so the livecd won't crash, so I can manage to install a newer version of Ubuntu, like 8.10 or 9.04.

 I usually install from the ubuntu alternate CD, but I bet that the
live CD is very similar. As soon as your installer has loaded the
kernel and ramdisk, the alternate CD stops to ask for input - e.g.
asking for language choice. It hasn't tried to load any networking
yet. You should be able to use <Alt>+F2 (or 3,4,5...) to switch to
another text console and get a root shell.

Once here, cd into /lib/modules. Next part of the path will depend on
the kernel version, but for an up-to date 8.10 system, the offending
module will be:

/lib/modules/2.6.27-11-generic/kernel/ubuntu/misc/wireless/acx/acx.ko

If there isnt an acx.ko there yet, then it may be loaded later in the
install process; you should be able to switch between the installer on
<Alt>+F1 and your text console in a back and forth mode until you see
the module get unpacked, and then simply remove the acx.ko module
before the kernel tries to load it.

I've a theory -- that the problem is triggered by WEP only -- I
suspect this since most folks would/should use WPA vs. the insecure
WEP. And if this driver was broken for WPA users, then surely there
would be many more bug reports.

Assuming my theory is correct, you could just take off your antenna,
or shut down the WEP access point during the install, so that it
doesn't run the WEP auth code.

Hope that helps.

Paul,