On 14 April 2010 23:25, Chris Wright <chrisw@xxxxxxxxxxxx> wrote: > * Pedro Ribeiro (pedrib@xxxxxxxxx) wrote: >> Turns out CONFIG_DMAR was disabled because of PREEMPT_RT. I disabled >> the later and enabled _DMAR. It took a long time to boot, something >> wrong with the usb ports. You can see it in the appended dmesg from >> time 11s to 100s. >> >> Then after it booted, I could barely move my USB mouse and lots of >> errors appeared on dmesg. I tried to connect the DVB card but it >> wouldn't even initialize. > > [ 316.360045] DMAR:[DMA Write] Request device [00:02.0] fault addr 23c00000 > [ 316.360046] DMAR:[fault reason 05] PTE Write access is not set > > That's your video device. Do you have CONFIG_DMAR_BROKEN_GFX_WA=y? > Where do I find this option in make menuconfig? Doesn't seem to be available... >> Enabling it with iommu=pt seemed to make no difference. > > It should (it should at least eliminate the video device problem). > You are right, it does eliminate that problem. However I can't get any of the USB devices to work, and the mouse is terribly slow. One more dmesg attached. Pedro
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