[Bug 111507] Unable to detect monitor modes connected to a TB16 Dell dock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111507

--- Comment #35 from Lionel Landwerlin <lionel.g.landwerlin at linux.intel.com> ---
(In reply to Lionel Landwerlin from comment #34)
> (In reply to Stanislav Lisovskiy from comment #33)
> > (In reply to Lionel Landwerlin from comment #32)
> > > FYI, on 
> > > 
> > > commit cde3db21383e3c077c278ba783e4ec8d006f2e32 (drm-tip/drm-tip)
> > > Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > Date:   Wed Sep 4 18:53:26 2019 +0300
> > > 
> > >     drm-tip: 2019y-09m-04d-15h-52m-25s UTC integration manifest
> > > 
> > > Things are working sometimes. Usually if I reboot the machine and it works,
> > > it'll keep working, if it doesn't work at boot, it won't ever work it seems.
> > > 
> > > Not quite sure where the issue lies...
> > 
> > Does it recover ever if you try to replug it?
> 
> Nop, it doesn't recover.

I should add I've also tried to unpower the dock etc... Nothing brings the
external monitor back. Only laptop reboot will do.

> 
> > 
> > One good thing to try: I think you mentioned that it was working on some
> > older kernel. Can you please get a dmesg from that one. Just do a single
> > unplug and plug. Then do the same with new kernel, so that it would be then
> > possible to compare those logs.
> > 
> > I'm really curious what is the issue, however looks like I can't reproduce
> > it with my machine, even though I also have TB16 connected through usb-c.
> 
> Will try this later. I can even provide a log with the same version when
> it's working.

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