On 01:15 am - Oct 21 2016, Lukas Wunner wrote:> 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. > > LukasYes, that bit had stayed in my memory, that switching between the two GPUs would not only switch them for the laptop screen, but for the external ones as well. IIRC, I am getting the no signal in both cases, but I need to retest. Pierre> > > 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.)-------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: not available URL: <https://lists.freedesktop.org/archives/nouveau/attachments/20161021/ea97efe0/attachment.sig>
On 21.10.2016 10:56, Pierre Moreau wrote:> On 01:15 am - Oct 21 2016, Lukas Wunner wrote: >> 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 > > Yes, that bit had stayed in my memory, that switching between the two GPUs > would not only switch them for the laptop screen, but for the external ones as > well. IIRC, I am getting the no signal in both cases, but I need to retest. > > PierreAny news related on your side?
I retested with both 4.8.4, Ben’s linux-4.9 and linux-4.10 branches (so only the linux-4.10 branch had the atomic+MST patches). For all branches, if I bootplug the external screen, I get nothing on the external screen, and the laptop screen is frozen with some mix of images (but the laptop itself is not locked up), nothing in dmesg. If I hotplug the screen, the laptop screen is not frozen, but starting with linux-4.10, I get an EVO timeout when turning off the external monitor. Adding your patch did not change anything for me. Looks like I’ll need to spend some more time testing and bisecting those issues… Pierre On 06:12 am - Nov 08 2016, poma wrote:> On 21.10.2016 10:56, Pierre Moreau wrote: > > On 01:15 am - Oct 21 2016, Lukas Wunner wrote: > >> 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 > > > > Yes, that bit had stayed in my memory, that switching between the two GPUs > > would not only switch them for the laptop screen, but for the external ones as > > well. IIRC, I am getting the no signal in both cases, but I need to retest. > > > > Pierre > > Any news related on your side? > > >-------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: not available URL: <https://lists.freedesktop.org/archives/nouveau/attachments/20161109/ebb4a1f6/attachment.sig>