Bug 842412 - [GMA X/Ironlake/Sandy Bridge] External display fails to turn on when plugged in via DP-to-DVI-D (dual link) adapter while laptop is suspended
[GMA X/Ironlake/Sandy Bridge] External display fails to turn on when plugged ...
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-intel (Show other bugs)
x86_64 Linux
unspecified Severity medium
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Assigned To: Adam Jackson
Fedora Extras Quality Assurance
: Triaged
: 846176 (view as bug list)
Depends On:
  Show dependency treegraph
Reported: 2012-07-23 15:37 EDT by Ian D. Bollinger
Modified: 2013-07-31 13:48 EDT (History)
7 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-07-31 13:48:21 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
dmesg output (80.11 KB, text/plain)
2012-07-23 15:37 EDT, Ian D. Bollinger
no flags Details
Xorg log (36.87 KB, text/plain)
2012-07-23 15:38 EDT, Ian D. Bollinger
no flags Details

  None (edit)
Description Ian D. Bollinger 2012-07-23 15:37:48 EDT
Created attachment 599848 [details]
dmesg output

This occurs whether or not the laptop is docked. So far I've reproduced the bug on the following devices: Lenovo Thinkpad X200 (GM45); X201, T510 (Ironlake); and T420s (Sandy Bridge).

Version-Release number of selected component (if applicable):

How reproducible:
Consistently; it happens 100% of the time.

Steps to Reproduce:
1. Suspend laptop.
2. Plug in external display via DisplayPort-to-DVI-D (dual link) adapter.
3. Resume laptop.
Actual results:
- idiot light blinks on monitor
- monitor doesn't turn on
- [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up

Expected results:
- monitor works

Additional info:
This bug also occurs when suspending the laptop on a docking station, undocking it, plugging in the display, and resuming. *BUT*, suspending while not docked, docking, plugging in the display, and then resuming does seem to work.
Comment 1 Ian D. Bollinger 2012-07-23 15:38:16 EDT
Created attachment 599849 [details]
Xorg log
Comment 2 Miroslav Mamrak 2012-08-13 08:31:58 EDT

Fedora Bugzappers volunteer triage team
Comment 3 Tony Fu 2012-09-19 02:26:22 EDT
*** Bug 846176 has been marked as a duplicate of this bug. ***
Comment 4 Luke Hutchison 2012-11-07 03:15:12 EST
Possible duplicate of my own bug, filed upstream here:

This is a DRM/kernel bug, not an xorg-x11-drv-intel bug (see "[drm:intel_dp_i2c_aux_ch]")
Comment 15 tkil 2013-05-14 11:21:49 EDT
I'm seeing the same issue on a fully-up-to-date x86_64 F18 install.  Adding myself to the CC, will see if I can help out with the upstream bug as well.

I'm using the Accell B087B-007B adapter:

If you can get graphics at all, a useful workaround (not sure where I copied this from):

xrandr --newmode '2560x1440_0.0' 241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync
xrandr --addmode DP1 '2560x1440_0.0'

Numbers were derived by plugging directly into the DisplayPort input on my monitor (Dell U2713HM), in which case things worked fine.  (I prefer DVI-D so I can use it with my KVM switch...)

Let me know if I can pull any more info for you.

Hm.  I do have another adapter I can try it with, although I might have to find a full-size-to-mini adapter first.  (I had a similar adaptor for my MacBook Pro, but it was so flaky that I couldn't stand to use it...)

Comment 16 Fedora End Of Life 2013-07-03 15:23:59 EDT
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Comment 17 Fedora End Of Life 2013-07-31 13:48:29 EDT
Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is 
no longer maintained, which means that it will not receive any further 
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