I have a Dell XPS 14 laptop and two Dell U2414H monitors I am trying to
make them work as two separate displays using MST under Ubuntu 14.04.
>From my laptop outputs a DisplayPort cable to the first monitor
DisplayPort input, then from this first monitor, outputs another
DisplayPort cable to the second one. All I get is the two U2414H
monitors mirrored, and they show up in Ubuntu display settings as a
single monitor.
If applicable in my setup I would like to test any patch possible. Here
are my devices from lspci (Notice I also have a Nvidia card which
appears as 3D Controller device)
VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics
Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device 054d
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at d1000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 4000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/820M / GT
620M/625M/630M/720M] (rev a1)
Subsystem: Dell GeForce GT 630M
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at d0000000 (32-bit, non-prefetchable) [size=16M]
Memory at a0000000 (64-bit, prefetchable) [size=256M]
Memory at b0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 3000 [size=128]
[virtual] Expansion ROM at b2000000 [disabled] [size=512K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Capabilities: [b4] Vendor Specific Information: Len=14 <?>
Capabilities: [100] Virtual Channel
Capabilities: [128] Power Budgeting <?>
Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024
<?>
Kernel driver in use: nvidia
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https://bugs.launchpad.net/bugs/1104230
Title:
DisplayPort 1.2 MST support is missing in the Intel driver
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https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1104230/+subscriptions
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