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Description of problem:
On my ThinkPad T430 with nVidia graphics, three monitor configuration doesn't work - internal laptop and two external displays connected via VGA and DVI.
Tried both mirror and span mode.
hw: NVIDIA Corporation GF108 [Quadro NVS 5400M] [10de:0def]
Version-Release number of selected component (if applicable):
kernel-2.6.32-347.el6
xorg-x11-drv-nouveau-1.0.1-3.el6
xorg-x11-server-Xorg-1.13.0-8.el6
xorg-x11-server-utils-7.5-13.el6
How reproducible:
100%
Steps to Reproduce:
1. Have two external displays connected via dock
2. Open Display Pref.
3. Try to setup Three monitor conf.
Actual results:
Could not find suitable configuration of screens
Expected results:
Three monitor conf. should work
Additional info:
Comment 1RHEL Program Management
2012-12-15 06:47:37 UTC
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.
The hardware can't actually support this configuration, this is not a bug. NVIDIA hardware only started supporting >2 displays as of Kepler hardware (so, GK1xx/(most)GeForce 6xx/Quadro Kxxxx boards).
(In reply to comment #2)
> The hardware can't actually support this configuration, this is not a bug.
> NVIDIA hardware only started supporting >2 displays as of Kepler hardware
> (so, GK1xx/(most)GeForce 6xx/Quadro Kxxxx boards).
I can see same behaviour on GK107 aka K1000M [10de:0ffc]
(In reply to comment #3)
> (In reply to comment #2)
> > The hardware can't actually support this configuration, this is not a bug.
> > NVIDIA hardware only started supporting >2 displays as of Kepler hardware
> > (so, GK1xx/(most)GeForce 6xx/Quadro Kxxxx boards).
>
> I can see same behaviour on GK107 aka K1000M [10de:0ffc]
Are you certain it's the same behaviour ("Could not find suitable configuration of screens") or a different failure? I just re-checked the kernel sources and if the hardware is claiming 4 CRTCs, it *should* work.