On Fri, May 08, 2020 at 11:06:56AM +0200, Yves-Alexis Perez wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > On Thu, 2019-09-05 at 20:53 +0200, Daniel Vetter wrote: > > The -modesetting ddx has a totally broken idea of how atomic works: > > - doesn't disable old connectors, assuming they get auto-disable like > > with the legacy setcrtc > > - assumes ASYNC_FLIP is wired through for the atomic ioctl > > - not a single call to TEST_ONLY > > > > Iow the implementation is a 1:1 translation of legacy ioctls to > > atomic, which is a) broken b) pointless. > > > > We already have bugs in both i915 and amdgpu-DC where this prevents us > > from enabling neat features. > > > > If anyone ever cares about atomic in X we can easily add a new atomic > > level (req->value == 2) for X to get back the shiny toys. > > > > Since these broken versions of -modesetting have been shipping, > > there's really no other way to get out of this bind. > > Hi Daniel and Greg (especially). It seems that this patch was never applied to > stable, maybe it fell through the cracks? What patch is "this patch"? > It doesn't apply as-is in 4.19 branch but a small change in the context makes > it apply. I'm experiencing issues with lightdm and vt-switch in Debian Buster > (which has a 4.19 kernel) so I'd appreciate if the patch was included in at > least that release. What is the git commit id of the patch in Linus's tree? If you have a working backport, that makes it much easier than hoping I can fix it up... thanks, greg k-h
