kernel module mismatch

The legacy nvidia module should be loaded automatically by modprobe when you have nvidia-glx-legacy installed. Of course, this trick may not work if you already have the non-legacy module loaded, so a reboot would be required.

Can you still reproduce this error on a current dapper installation?

I got a similar error on Edgy Etch and also on a freshly installed Feisty beta (x86).
After installing legacy-drivers, X works fine as long as you do not install any kernel-updates (that adept_updater proposes). Even after updating the nvidia-legacy packages, X won't start and first complained about a missing module "wfb" and now about mismatch in module versions.

To solve this I previously tried the envy-script, and also "update-modules" sometimes helped. But in Feisty I am lost since envy does not yet support this version and "update-modules" as well as "module-assistant" did not help now.

JaparM:
A geforce mx 400 should not use the 71xx legacy drivers (see http://us.download.nvidia.com/XFree86/Linux-x86/1.0-9755/README/appendix-a.html ). I guess in dapper (I no longer use it so I can't check) your card should be using the 8xxx series of drivers. Could you indicate if this is a problem on Feisty (perhaps by not installing anything and using a livecd)?

Gregor:
Please create a separate bug report for your Feisty issue rather than overloading this one. In that bug report please give the output of:
lspci | grep -i nv
dmesg
dpkg -l nvidia* | grep ii

You may also want to indicate what the results of using
restricted-manager
in that new bug report too. If you can subscribe me after you have made that will be helpful too.

Setting to needsinfo pending reply from JaparM.

[Expired for linux-restricted-modules-2.6.15 (Ubuntu) because there has been no activity for 60 days.]