On Tue, 2007-03-06 at 11:07 +0100, Michel Dänzer wrote: > This functionality has been available on branches i915-pageflip (drm), > i830-pageflip (xf86-video-intel) and i915tex-pageflip (mesa) for two > weeks. In order to be able to use page flipping independently on each > pipe, the X server DRI module changes from the xserver master branch are > also needed. > > I developed and tested this on i945 hardware. I've had reports of it > working on i915 as well but would be interested in hearing whether it > works on i830 and above. > > The only significant outstanding issue I'm aware of is that moving a > page-flipped 3D window from being visible on pipe A only to being > visible on pipes A+B can result in a lockup if the flips on pipe B are > emitted 'too quickly'. I'm currently avoiding this by not syncing the > pages between pipes immediately in that situation, so it only seems to > happen with insane framerates such as glxgears', but this could probably > cause issues of its own with apps that render to the front buffer. It > doesn't seem to happen when moving from pipe B to pipes A+B, and the > command stream always waits for previous asynchronous flips to complete > before emitting a new flip, so I'm not sure what's up. Any ideas would > be appreciated, especially from the Intel folks. > > Possibly related to this, it's been reported that there can be issues > with outputs that aren't handled quite correctly by the modesetting > driver (yet), e.g. LVDS on desktop boards. If you have issues with page > flipping and xrandr 1.2 shows outputs that shouldn't be there, try > disabling them.
Even better, file a bug with Xorg.0.log and the output of scanpci from libpciaccess, and we can blacklist the LVDS on your board hopefully. > If there are no objections, I'd like to merge these branches to the > respective master branches by the end of this week. Of course, if the > issues above can't be solved before the merge, I'll document them in the > intel.4 manpage. -- Eric Anholt [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED]
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