Messages in this thread | | | Subject | Re: 2.6.29-rc powerpc G5 Xorg legacy_mem regression | From | Benjamin Herrenschmidt <> | Date | Thu, 22 Jan 2009 16:16:10 +1100 |
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> That's as far as I took it: I can see there's code to set up > "Legacy VGA memory" but it looks like that's not coming into play. > dmesg and .config attached: I think you'll get to the point much > quicker than I would. > > Though I bet you're busy at the moment: no hurry, I can comment > out the pci_create_legacy_files() from drivers/pci/bus.c for now.
It's actually an X bug :-(
IE, I always create the legacy files, I just make mmap fail when legacy VGA isn't available. This is the right way to do it, as it properly informs X that yes, I do support the new API and no, there's no point in trying to access legacy VGA memory on this machine.
I honestly don't see how I can fix that without making proper support for legacy memory / IO impossible, and thus guaranteeing that X will eternally continue to crap on random bits of /dev/mem in the future :-(
Cheers, Ben.
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