screen resolution and refresh rate
 

Hello!

Today I installed the latest version of the nvidia driver on a Slackware 11.0 system with kernel 2.6.18-generic. It got installed successfully and 3-D hardware acceleration got activated. The problem is that the screen resolution is no longer 100x100 dpi, and the vertical refresh rate is no longer 85 Hz, although the display is still set to 1024x768 and in the Monitor section of xorg.conf the entries are DisplaySize 260 195 and the output of `gtf 1024 768 85`. I experimented manipulating the values of DisplaySize, but this did not lead to any change - it seems that after the installation of the nvidia driver this part of xorg.conf is ignored.

Any suggestions will be appreciated.

P.S. I would be thankful if you tell me some shell commands for displaying the current monitor refresh rates and screen resolutions.

Regards,
Martin

The nvidia driver is probably using EDID to get your monitor's capabilities (i.e. refresh rates, display size, etc.) You can check this by looking in the Xorg.log file for messages about EDID.

If you look in the documentation that came with the nvidia driver you will see that there is an option called "IgnoreEDID" that you can use to bypass the driver autodetecting your monitor's capabilities. I think you do this by adding the following to your Monitor section in the Xorg config file:

You'll find them in /etc/X11/xorg.conf.
Like regis_n_bits wrote, put that Ignore EDID line in that file and you'll probably be fine (had some troubles myself with such a matter, it worked perfectly).

BTW, if your monitor is not too old, you can do a lot better than 1024*768, mine is six years old and does 1280*1024.

Thank you guys, I will try it these days and let you know what has happened :)

Regards,
Martin

Hello again!
I managed to get the desired screen resolution and vertical refresh rate. You were right actually, but the option is no more "IgnoreEDID" but "UseEDID". The option "IgnoreEDID" is deprecated and no more affects the behaviour of the nvidia driver.
Thank you very much indeed!

There will be no longer 85Hz refresh rate on most of the monitors, so
i'd better choose the 1024*768 resolution as its refresh is 85Hz