• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 338
  • Last Modified:

Not getting the highest resolution on my screen

I'm using a ViewSonic VP201b with a radeon 9600 xt 128 mb ddr Adapter.  I booted fine and changed my resolution
to 1600 by 1200, but the screen goes black and I have to go into terminal mode, edit /usr/X11/xorg.conf changing
to a lower resolution to get going.  It's a dual boot system and this monitor and adapter give flawless 1600 by 1200
under windows.  How can I get the same resolution under Fedora core 3?

Thanks in advance...
  • 3
  • 2
  • 2
2 Solutions
Have you made sure to set the refresh rates, Vertical Refresh, Horizontal Sync
correctly, according to the monitor's specs?

Do you have a device section for the display adapter, and have you ensured the
driver and settings are correct?
> radeon 9600 xt 128 mb ddr Adapter
> same resolution under Fedora core 3?
You need to looad the right video driver. As root, run
And select the right monitor (ViewSonic VP201b) and the video card (ATI Radeon 9600).
If you do have the right driver, then you can not go to the highest resolution.
Go to ATI
and download
rpm -ivh fglrx_6_8_0-8.12.10-1.i386.rpm

Also, check the release note:

padmasambhavaAuthor Commented:
I've set it up for the monitor and adapter, all that looks fine.  I've also upgraded to the latest driver.  xorg.conf has the correct settings for horizontal and vertical freqs.  The only thing I see missing is the refresh rate should be 60, but I don't know how to specify it.
 [eBook] Windows Nano Server

Download this FREE eBook and learn all you need to get started with Windows Nano Server, including deployment options, remote management
and troubleshooting tips and tricks

Overall refresh rate is given  as a range

VertRefresh xxx-yyy
HorizSync xxx-yyy

Also, in the Mode or ModeLine directive for each resolution,
there are other parameters that go with every resolution...

dot clock, horizontal sync timings, and vertical sync timings, and
options like Interlaced,  DoubleScan... polarities...

see    man xorg.conf

From the specification of ViewSonic VP201b:
In xorg.conf, your monitor should be
HorizSync  30.0 - 92.0
VertRefresh 50.0 - 85.0
padmasambhavaAuthor Commented:
That's what I've got there.  Do you know of any problems with that driver?  I updated it from the viewsonic
site and it seemed to work.  But I'm enough of a newbie at linux that I'm not sure.  How can I check the
version number on it?

> How can I check the version number on it?
What version number do you mean?

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 3
  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now