Bug 1294300 - Dual monitor setup fails for second device (DVI-I-2) , that worked with a nvidia driver before
Dual monitor setup fails for second device (DVI-I-2) , that worked with a nvi...
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-nouveau (Show other bugs)
x86_64 Linux
unspecified Severity high
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Assigned To: Ben Skeggs
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-12-26 12:18 EST by Christian Groove
Modified: 2016-12-20 12:24 EST (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2016-12-20 12:24:08 EST
Type: Bug
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Description Christian Groove 2015-12-26 12:18:44 EST
Description of problem:

Enabling the second dvi attached monitor in
the KDE or Gnome config/setting tools (section 
display and monitor) identifies correctly both 

1) ASUS PB278 (DVI-I-1 works)
2) Goldstar Company Ltd 22EA63 (DVI-I-2 try to get it working)

Then, i arranged the new monitor and expect, that 
something happens. Well the X11 session expands the
screen virtually, but the monitor device tells me,
that there is no DVI signal. 

Both devices are connected via DVI and the graphic

   06:00.0 VGA compatible controller [0300]: NVIDIA Corporation G96 [GeForce 9500 GT] [10de:0640] (rev a1) (prog-if 00 [VGA controller]) 

has 2 DVI ports. Using Fedora F21 and Nvidia driver loaded
via RPMFusion i did not have any problem using both monitors.
There was no change with my cable, so it should work.

I also tried to address the LG monitor using a 
Acer Aspire V3-771 notebook connected by HDMI
(also using a fresh Fedora F23 installation and
.. it worked. So i believe, it is a nouveau

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

How reproducible:
Simply go to the systemconfiguration tool (regardless gnome or kde)
and try to enable the dvi-i-2 connected second monitor. It will
fail permanently.

Steps to Reproduce:
1. call system-setting in KDE or gnome and configure your second monitor.
2. tell your monitor (mine is a LG) to search for DVI input and you get "no signal".
3. hope that nvidia will be released ;-) 

Actual results:
second monitor is a dark matter ;-)

Expected results:
an expanded screen

Additional info:
contact me, so i can send you additional information
see also: https://bugzilla.redhat.com/show_bug.cgi?id=692035
Comment 1 Christian Groove 2015-12-26 12:31:20 EST
Gnome/Wayland behaves the same way, it shows 
both displays correctly, but the monitor says
"no signal".

$ xrandr 
Screen 0: minimum 320 x 200, current 4480 x 1440, maximum 8192 x 8192
XWAYLAND0 connected 2560x1440+0+0 600mm x 340mm
   2560x1440@0.1Hz   0.05*+
XWAYLAND1 connected 1920x1080+2560+360 480mm x 270mm
   1920x1080@0.1Hz   0.00*+

Strange ...
Comment 2 Fedora End Of Life 2016-11-24 09:31:51 EST
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Comment 3 Fedora End Of Life 2016-12-20 12:24:08 EST
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
no longer maintained, which means that it will not receive any further
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