On Thu, Oct 20, 2016 at 10:08:28AM +0200, Lukas Wunner wrote: > On Wed, Oct 19, 2016 at 07:58:06PM +0200, Pierre Moreau wrote: > > For example, my laptop (which also has an NVAC) has been triggering the > > no-signal message on external monitors way before Ben???s patch landed, > > but only for some adapters. I haven???t tried Ben???s patch yet, nor > > yours, but I will certainly do it, and see what effect each of them has. > > The external DP port on your MBP5,3 is switchable between GPUs and > the apple-gmux driver switches it in unison with the panel. Thus > the NVAC cannot drive external displays when gmux is switched to > the MCP79. (You probably were aware of this, just wanted to mention ^^^^^ I meant G96, sorry I mixed it up.
Lukas > it in case you weren't.) (In theory we could change vga_switcheroo > and apple-gmux to support switching the panel and the external port > separately rather than in unison if there is demand. It's only > supported on MBPs introduced from 2008 to 2010 though, the 2011+ > models can only drive external ports with the discrete GPU.) _______________________________________________ Nouveau mailing list Nouveau@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/nouveau