On Sun, Feb 22, 2009 at 8:27 AM, J.C. Roberts <list-...@designtools.org> wrote: > Hi list, > > I'm a having few issues with the new intel(4) driver in X on -CURRENT > using the snapshot from two days ago. > > The system is an IBM Netvista 8310-XXS and uses an integrated Intel > 82845G. The dmesg is below. The hardware itself is fine, and it > previously ran 4.4-stable perfectly, albeit on -stable it used the now > removed/renamed i810(4) driver. > > Yes, I've got the aperture sysctl set for running X. > $ sysctl machdep.allowaperture > machdep.allowaperture=2 > > The BIOS settings for the integrated video are: > Primary Video: Integrated > Video RAM: 8192KB > AGP Aperture: 32MB > > Most of the time, when starting up X with plain vanilla `startx` and no > xorg.conf file, X fails to start. On two rare occasions, X somewhat > started but died shortly afterwards with a long list of errors like: > > (EE) intel(0): underun on pipe A! > > The bulk of the time, X never starts, and the errors are different. > I've included three Xorg.0.log files below, each done with different > AGP Aperture settings. The last Xorg.0.log is the partial startup (with > the above error), and but the first two seem to be a bit more telling. > I *think* the problem is somehow related to AGP Aperture, so I've tried > all of the available values in the BIOS (32MB, 60MB, 128MB, 256MB) in > hope of seeing different behavior. There are some differences in the > logs below. > > This system used to work fine with X auto-configuration on 4.4.-stable > using the old i810(4) driver and without an xorg.conf. Tonight I'll run > some more tests with the new intel(4) driver an a simple xorg.conf to > shut off features. > > Though the problem exists in the 2009.02.18 i386 snapshot, last night I > built -CURRENT from source, and the problem still exists. > > I don't know much about X driver internals, but on the majority of > failures to start, it seems the new intel(4) driver is failing to map > memory properly. > > If you've got any ideas, or if there is something specific that you > want to see tested, please let me know. >
On i8xx chipsets that are experiencing this kind of problems, switching back to the XAA acceleration methode generally works. Add Option "AccelMethod" "XAA" to the Device section of your xorg.conf file -- Matthieu Herrb
