This allowed me to use the max resolution of 2560x1440. The U2711 is used as my second extended monitor, my laptop screen is my main display. I now switched laptops to a new Latitude E6520 (with an Nvidia NVS 4200M graphics card) that does not have a DP output nor a DVI output.
I've got a Dell Latitude E6520 and I'm using the E Port dock to get a DisplayPort output to plug into a Dell U2711 monitor.
The native resolution of the monitor is 2560x1440 and I'd really like to get it to that resolution.
I'm using the Nvidia X settings thing and I the highest resolution listed is 1920x1080. Is it worth hand editing the xorg.conf file maybe? Or am I just out of luck?
The graphics card (NVIDIA NVS 4200M 512MB) seems to be functioning ok. Unity and the composite effects are all working and pretty snappy.
I did have to disable something called Optimus in the BIOS but I gather this is just a power saving thing.
3 Answers
From what I understand, 'Optimus' is the technology, which decides, when to use the dedicated Nvidia graphics card and when to use the on-board intel graphics chip.
https://secure.wikimedia.org/wikipedia/en/wiki/Nvidia_Optimus:
For now, Nvidia has no plans to support Optimus on Linux. This makes hardware acceleration impossible by the Nvidia adapter. However, Martin Juhl is working on an Open source alternative called Bumblebee (https://github.com/MrMEEE/bumblebee).
You might want to check out the Bumblebee project, it seems to me, that this is, what you need to use your Nvidia graphics card.
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I had the same problem, my monitor would only output at 1600x1050. In addition the display port would not work and dual-link DVI only outputted the above resolution. What I ended up doing was updating the bios to revision A07. This resolved the display issue. Now I'm just trying to figure out how to get the docking station to work correctly (i.e. having the monitors switch on the fly).
Luis
When I upgraded to Ubuntu 11.10 I was able to select the full resolution in the nVidia settings dialogue and everything worked perfectly.
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I got a Lenovo T420s with a dedicated NVS 4200M Graphics Card running Ubuntu 18.04 and want to connect to an external monitor with WQHD resolution. However, when joining displays, the external monitor's max resolution only goes up to 1920x1080 in the Displays settings:
I tried connecting with both HDMI and DP. Weirdly, when I use DP, the monitor stays dark altogether (and does only 'occasionally' show up in Displays settings), but I can drag windows over to it.
What more can I do to debug this?
Nvidia Nvs 4200m Update
1 Answer
I solved this problem by following this answer to a similar question on ubuntuforums.org:
Disabling NVIDIA KMS (enabled by default in 390.77) resolves the issue:
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Nvidia Nvs 4200m Max Resolution Hdmi Converter
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