Sorry. A quick run of lspci -vvn in Feisty Herd 4 does show the device id as 0x0308, so maybe that means the kernel is properly detecting it as a PT880 Ultra, and something else is causing both Edgy and Feisty to hardlock in X. -- no support for VIA PT880ULTRA on amd64/xeon https://launchpad.net/bugs/32968