On Wed, Sep 21, 2011 at 8:52 PM, Michael Witten wrote: > Because my hardware does appear to be malfunctioning due to a corrupt > video BIOS, it seems prudent to salvage as much as possible from > its output, so that it is possible to figure out which other values > need to be hardcoded in case of further corruption. > > To do this, I did 2 things: > > ?* Export the video BIOS data via debugfs, so that it can be > ? ?easily backed up in secondary storage. > > ?* Hack the existing Radeon driver code to log information > ? ?about which values are being read from the video BIOS > ? ?data and from which offsets these values are being read. > > I first wrote the following patch to export the video BIOS via debugfs > (I wrote a little more than necessary; it should be generally applicable):
Is there any reason to use your debugfs patch instead of reading the BIOS the "classic" way? (as root) (use lspci to get the bus id) cd /sys/bus/pci/devices/<pci bus id> echo 1 > rom cat rom > /tmp/vbios.rom echo 0 > rom Regards, Tormod
