On Thu, Jun 21, 2012 at 12:59:00PM +0200, Dominik Brodowski wrote: > > On Wed, Jun 20, 2012 at 06:10:12PM +0200, Daniel Vetter wrote: > > On Wed, Jun 20, 2012 at 08:56:26AM -0700, Greg KH wrote: > > > On Wed, Jun 20, 2012 at 05:48:42PM +0200, Dominik Brodowski wrote: > > > > Hi, > > > > > > > > At work, I wish to attach a 27" Apple Display using thunderbolt to my Mac > > > > Book Air 4,2 13". Using OS X, it works fine, but as I prefer using Linux, I > > > > tested out Ubuntu's stock kernel and (among other) 3.5.0-rc3+ as of f40759e. > > > > Hotplug doesn't work (known issue), but also with coldplug the display > > > > reacts _very_ slow, way too slow for real use: The screen updates only every > > > > half second or so. Is this a known bug? Might something go afoul with > > > > kworker -- they need about 75% of the CPU with the large display attached, > > > > and less than 1% _without_ the large display. > > > > > > It's not really a known bug, but it is known that Thunderbolt doesn't > > > work all that well, if at all, in Linux due to the BIOS issues that you > > > have run into (the hotplug stuff.) > > Is there anything where I could help? If you can figure out how Apple implemented this with their custom ACPI interface, that would be most helpful. I have a Thunderbolt machine on order and will start to work on this in a month or so when I receive it. thanks, greg k-h _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
