Bug 983386 - External monitor connected with miniDP adapter gives wrong resolutions
External monitor connected with miniDP adapter gives wrong resolutions
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
Depends On:
  Show dependency treegraph
Reported: 2013-07-11 02:20 EDT by vincentvdk
Modified: 2014-02-05 17:06 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2014-02-05 17:06:22 EST
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Tracker ID Priority Status Summary Last Updated
FreeDesktop.org 56834 None None None Never

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Description vincentvdk 2013-07-11 02:20:23 EDT
Description of problem:

Wehn I connect an external monitor to my laptop with a MiniDipsplayPort adapter, it doesn't show all the available resolutions. The monitor supports 1920x1080 while xrandr reports up to 1024x768.

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

intel driver  
Version     : 2.21.8
Release     : 1.fc18

How reproducible:
Connect external screen to laptop with MiniDiplayPort adapter

Steps to Reproduce:
1. connect screen
2. try to set the resolution

Actual results:

Not all supported reolutions are shown

Expected results:

All supported resolutions should be available.

Additional info:

Laptop type : Dell XPS13 (sputnik project with Ubuntu)

xrandr output 
→ xrandr 
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 294mm x 165mm
   1920x1080      60.0*+   40.0  
   1400x1050      60.0  
   1280x1024      60.0  
   1280x960       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0* 
   800x600        60.3     56.2  
   848x480        60.0  
   640x480        59.9  

Dmesg shows this :

[  642.088252] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
Comment 1 vincentvdk 2013-07-11 02:25:57 EDT
Some additional info:

When I initially installed F18, the screen could be used with the correct resolution.

current kernel : 3.9.6-200.fc18.x86_64

Output of monitor-edid

EDID version: 1.4
EDID extension blocks: 0
Screen size: 29.4 cm x 16.5 cm (13.27 inches, aspect ratio 16/9 = 1.78)
Gamma: 2.2
Digital signal

	# Monitor preferred modeline (60.0 Hz vsync, 66.7 kHz hsync, ratio 16/9, 165 dpi)
	ModeLine "1920x1080" 138.78 1920 1966 1996 2080 1080 1082 1086 1112 -hsync +vsync

	# Monitor supported modeline (40.0 Hz vsync, 44.5 kHz hsync, ratio 16/9, 165 dpi)
	ModeLine "1920x1080" 92.52 1920 1966 1996 2080 1080 1082 1086 1112 -hsync +vsync
Comment 2 vincentvdk 2013-11-10 10:55:17 EST

I gave this another go since running Ubuntu is not really my thing. When I run this I can get the ecternal screen screen to work with the correct resolution

Fedora20 Aplpha

[root@localhost ~]# xrandr --newmode 1920x1080_ 173.00 1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
[root@localhost ~]# xrandr --addmode DP1 1920x1080_
[root@localhost ~]# xrandr --output DP1 --mode 1920_1080_
Comment 3 Fedora End Of Life 2013-12-21 09:18:15 EST
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 18. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '18'.

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to a later Fedora version prior to Fedora 18's end of life.

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Comment 4 Fedora End Of Life 2014-02-05 17:06:22 EST
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
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