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Ubuntu 12.04, Nvidia resolution pproblem

Asked by Karl Ryder

I recently did a fresh install of Ubuntu 12.04 on a LenovoT410 and everthing seemd to be fine. I was able to use the Nvidia settings tool in the normal way I had been doing in 10.04. However, in a recent update I now can only see one screen resolution (1440x900) in the settings tool for the Lenovo screen. This is fine for just working with the lap top on it's own but I regularly use other screens and projectors so I can't clone the screen to a device with a different screen resolution (an old rojector with 1024x760 for exmple). I tried installing the post-release and experimental versions of the Nvidia drivers from the additional drivers tool but this does not solve the problem. I see from the forums that there have been issues with Nvidia drivers in 12.04 but from what I've read the symptons seem to be different.

Any suggestions greatully received.

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actionparsnip (andrew-woodhead666) said : 		#1

Did you upgrade online from 10.04 to 12.04 or did you wipe Lucid off and clean install Precise?

Thanks

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Karl Ryder (k-s-ryder) said : 		#2

I installed 12.04 on a new disk.
Thanks.

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actionparsnip (andrew-woodhead666) said : 		#3

Accrording to:
http://www.notebookreview.com/default.asp?newsID=5525&review=lenovo+thinkpad+t410

It has a switchable GPU. I suggest you look into Bumblebee.

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Karl Ryder (k-s-ryder) said : 		#4

Not sure I understand the answer sorry. What is the relevance of a switchable CPU?

All the Nvidia resolution options were present in the Nvidia settings tool for the virgin install of 12.04. It was not until a subsequent update that the resolution options disappeared. Now when I open the Nvidia setings tool and cick on the resolution drop-down for the Lenovo screen all I see is "Off", "Auto" and "1440x900"

I had thought it might be possible to reinstall an older version of the Nvidia driver but I don't know how to do that.

What is Bumblebee?

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actionparsnip (andrew-woodhead666) said : 		#5

Your CPU also has an Intel GPU in it, so it is switchable between. Its a nasty hack to try and save power.

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Karl Ryder (k-s-ryder) said : 		#6

Thank you for this but I'm afraid that it brings me no closer to understanding your answer or solving my problem.

Are you sayng that the lenovo CPU architechture is no longer compatible with the most recent Nvidia driver?

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actionparsnip (andrew-woodhead666) said : 		#7

What is the output of:

sudo lshw -C display

Thanks

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Karl Ryder (k-s-ryder) said : 		#8

  *-display
       description: VGA compatible controller
       product: GT218 [NVS 3100M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a2
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:16 memory:cc000000-ccffffff memory:d0000000-dfffffff memory:ce000000-cfffffff ioport:2000(size=128) memory:cd000000-cd07ffff

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actionparsnip (andrew-woodhead666) said : 		#9

Ah, seems I was wrong. Just an nvidia. Makes life easier :-)

Did you try:

sudo nvidia-xconfig

Reboot to test

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Karl Ryder (k-s-ryder) said : 		#10

Hi,
no good I'm afraid. Nvidia settings still showing only one resolution option.

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