[Bug 88124] i915: regression: after DP connected (via docking station) monitor is turned off, when turned on, it does not work anymore

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88124

--- Comment #82 from Jiri Pirko <jiri at resnulli.us> ---
(In reply to Dhinakaran Pandiyan from comment #81)
> Jiri,
> 
> Sorry about the bug getting closed, I haven't worked on this for a while.
> There were no patches merged to address the connector ID change, so the
> retest on drm-tip wasn't necessary IMO. However, there was another related
> issue (monitor on-off) with the same configuration that got fixed. This was
> the reason for @c58 and it seems like the thread got sidetracked since that
> point.
> 
> A quick note about the connector IDs. The connectors for displays attached
> to the docking station are created and destroyed dynamically during during
> hotplug/monitor off-on. This is why the ID's change and the flip-flopping of
> connector ID's is probably due to the order in which connectors are
> destroyed and created again. User space is typically able to handle this.
> Connector ID's are stable only for ports directly connected to the GPU. For
> e.g., connector 82: type DP-2 for the docking station is what is going to
> stay the same.
> 
> As long as the kernel updates the connection status correctly and sends
> hotplug events, user space is expected to deal with change in connector IDs.
> I am not familiar with xmonad, so I don't know what's going on there. Let me
> see if I can find out more.

The thing is, there has to be some userspace daemon monitoring the events and
pushing the setting down accordingly. I have no such daemon.
Previously, before patch 0e32b39ceed665bfa4a77a4bc307b6652b991632, the ids were
stable so all worked fine even without need to any additional userspace daemon.
Could you make the connector IDs stable again?

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180424/c46a543f/attachment.html>