lkml.org 
[lkml]   [2019]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Thunderbolt DP oddity on v5.2.9 on iMac 12,2
On Wed, Aug 28, 2019 at 06:43:35PM +0800, Brad Campbell wrote:
> On 28/8/19 6:23 pm, Mika Westerberg wrote:
>
> > On Wed, Aug 28, 2019 at 05:12:00PM +0800, Brad Campbell wrote:
> >
> > Apart from the warning in the log (which is not fatal, I'll look into
> > it) to me the second path setup looks fine.
> >
> > Can you do one more experiment? Boot the system up without anything
> > connected and then plug both monitors. Does it work?
> >
>
> Aside from head ordering issues in X it works just fine.
> I've attached the dmesg. Boot with nothing plugged in, then plug in 0-1 and
> 0-3 in that order.

OK, thanks for checking. So when Linux is in complete control both DP
tunnels get created properly. I suspect there is something different
what the firmware does compared to other Macs I've been using and that
causes the driver to fail to discover all the paths. I will take a look
at this but I'm away tomorrow and friday so it goes to next week.

BTW, have you tried to chain the two monitors?

\
 
 \ /
  Last update: 2019-08-28 15:20    [W:0.078 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site