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Bug 645087 - Dual monitor's causes fall back on Dell D620
Dual monitor's causes fall back on Dell D620
Status: RESOLVED DUPLICATE of bug 646280
Product: gnome-shell
Classification: Core
Component: general
2.91.x
Other Linux
: Normal normal
: ---
Assigned To: gnome-shell-maint
gnome-shell-maint
: 657024 (view as bug list)
Depends on:
Blocks:
 
 
Reported: 2011-03-17 23:54 UTC by G. Michael Carter
Modified: 2013-06-13 10:05 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description G. Michael Carter 2011-03-17 23:54:05 UTC 
On my Dell D620 (laptop) dual monitors causes it to fall back.   If I unplug the monitor, can log in everything works fine.  

If I then plug in the monitor to the VGA port on the back it switches monitors (Still only single display) and it works fine.

If I go into the display dialog box and activate both screens I get all sorts of wonky stuff happening, lines, screen blanking, you name it.

If I have the monitor plugged while logging in it does a fall back.


Here's the computer profile: http://www.smolts.org/client/show/pub_0273df03-f323-4b5a-915a-913eec2423ce 

I hope it doesn't change as I'm booting with a USB key so I can try this on different computers.
Comment 1 Owen Taylor 2011-03-19 18:56:24 UTC 
The gm945 chipset is restricted to a horizontal area of 2048 pixels for 3d acceleration, so you aren't going to be able to use gnome shell in side-by-side mode.

The current design for that was initially that you were supposed to go to mirrored mode rather than falling back on login. (The reason for this, is that logging in attached t a projector shouldn't just change your user experience) and that you need to explicitly enable fallback before you can pick side-by-side mode in the display capplet.

I don't know if we got anywhere on implementing that. Colin?
Comment 2 Colin Walters 2011-03-19 19:10:59 UTC 
Hmm, no; we didn't end up with any code for the xrandr case =/  We could try to do the mirroring fallback on login for 3.0 possibly?
Comment 3 Ray Strode [halfline] 2011-08-22 15:39:48 UTC 
*** Bug 657024 has been marked as a duplicate of this bug. ***
Comment 4 Rui Matos 2011-08-26 13:18:16 UTC 
*** Bug 657431 has been marked as a duplicate of this bug. ***
Comment 5 sam tygier 2011-11-07 13:50:21 UTC 
I also have an intel 945GME. in fedora 16, gnome 3.2 when i plug in a display i get gnome-shell spanned across both displays, but at an unbearably low speed, 30 seconds to a minute for any action to show on screen.

if i switch to a vertical layout the graphics acceleration comes back, but i can't actually move any windows to the top screen (i can move my mouse there). should I file a separate bug for this?
Comment 6 Ray Strode [halfline] 2011-11-07 20:16:00 UTC 
if you open up the display panel in control center and drag the black panel to the top monitor things should start working better.

There may already be a bug about that issue. Florian and I talked to someone a few days ago who said he was going to file that bug.  If he didn't a bug report would be good, though.
Comment 7 sam tygier 2011-11-09 13:22:36 UTC 
thanks. I reported bug 663690 about dragging windows.
Comment 8 Bastien Nocera 2013-06-13 10:05:19 UTC 
Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.

*** This bug has been marked as a duplicate of bug 646280 ***