Strange problem after RAM-upgrade

[reptiler]

Just today I got myself a little xmas present: a bit more RAM.

I upgraded my RAM and started F10 (64 Bit). Strangely I have no sound. My card shows up in lspci
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia
and the modules show up in lsmod
snd_hda_intel 476576 0

I don't think it's a hardware-problem, as sound works perfectly fine in my (mostly unused) Windows XP (64 Bit).

This just now happened after upgrading from 2GB of RAM to 6GB.
Before I had two times 1GB (Kingston DDR2-667) and now I added two times 2GB (Kingston DDR2-800).
All the RAM is detected and is usable, just the sound stopped working.

The card doesn't show up in the PulseAudio mixer and all checks through ALSA tell me that there's no card.

dmesg tells me this about my soundcard:

HDA Intel 0000:00:14.2: PCI INT A -> GSI 16 (level, low) -> IRQ 16
ALSA sound/pci/hda/hda_intel.c:1232: hda-intel: no codecs initialized
HDA Intel 0000:00:14.2: PCI INT A disabled


Any ideas?

[pete_1967]

Try re-seating the souncard.

[reptiler]

It's an on-board chip, so re-seating isn't possible.
And, as said, it works on Windows...

In the meantime I tried a few things.
I took out one of the new chips, and it doesn't work. Exchanged them, doesn't work.
Took out both new chips and the sound is back.
Took out both old chips and put the new ones into the slots of the old ones, no sound.

Still have to check with only one of the new ones, but somehow I expect no sound.

Next stop: BIOS-upgrade...

[reptiler]

It looks like the BIOS-upgrade sorted the problem.

So, in case anybody with an ASUS M2A-VM runs into this problem you may consider upgrading your BIOS.
I run with the full 6GB now (except the 512MB that are not accessible to the OS as they are assigned to the on-board GPU) and have sound.