Bug 73687 - [IVB DP Dongle] Apple miniDP-to-DP dongle hotplug fail after start X
Summary: [IVB DP Dongle] Apple miniDP-to-DP dongle hotplug fail after start X
Status: CLOSED NOTABUG
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-01-16 07:53 UTC by Qingshuai Tian
Modified: 2017-07-06 17:37 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg of DP dongle plugged in after X starting (121.95 KB, text/plain)
2014-01-16 07:53 UTC, Qingshuai Tian 		no flags Details
View All

Description Qingshuai Tian 2014-01-16 07:53:30 UTC 
Created attachment 92207 [details]
dmesg of DP dongle plugged in after X starting

Environment:
-------------------
  Kernel: (drm-intel-next-queued) f1fcde49872f390a4060fa9ee8b02d3f2a8508b7
  Hardware name: Apple Inc. MacBookPro10,2/Mac-AFD8A9D944EA4843, 
  BIOS MBP102.88Z.0106.B03.1211161133 11/16/2012

Description:
--------------------
When I plugged the miniDP-to-DP dongle in the machine after booting up and starting X, the DP monitor was black, while xrandr command showed "DP2 connected (normal left inverted right x axis y axis)".

After I set command "xrandr --output DP2 --preferred" , the monitor can show correctly. And the hotplug will also work well since then.

The miniDP-to-DP dongle hotplug works well without starting X.

Test Step:
--------------------
1.reboot machine
2.start X
3.plug in miniDP-to-DP
Comment 1 Chris Wilson 2014-01-16 08:51:24 UTC 
If you plug in a monitor after X is started, it is up to userspace to decide what it wants to do with the monitor. Your userspace left it disabled until you manually enabled it with xrandr.
Comment 2 Qingshuai Tian 2014-01-16 08:53:31 UTC 
Got it! Thanks!

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.