quser
September 17th, 2009, 06:39 PM
I'm having an issue with not being allowed to set a refresh rate above 60Hz on the 2nd monitor of my video card with Catalyst Control Center. What I would like is to have both monitors working at 1280x1024 @ 85Hz with Xinerama. All I need to acheive this is for the 2nd monitor to be at 85Hz instead of 60Hz.
Video Card: Asus EAH 3650 Silent, ATI Radeon HD 3650 graphics engine
OS: Ubuntu 9.04 64-bit, all updates complete
Video Drivers: ATI Catalyst 9.9 (latest from ATI website)
Displays: Dell P991 and ViewSonic G90fb (CRT displays, both connected with DVI to VGA adapters)
When originally trying to set up dual displays, I used the proprietary ATI/AMD FGLRX drivers installed through "Hardware Drivers" in ubuntu, but I could never get the displays set up properly, or get Xinerama to turn on. However, I was able to set either display to 1280x1024 @ 85Hz if I messed with things in the right way, but never simultaneously as non-cloned displays. In any event, nothing ever seemed to work consistently.
So I installed the drivers directly from the AMD website (http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx), and everything works much more like it should, with the exception that I am not given the option to set the 2nd monitor to a refresh rate higher than 60Hz. I've tried adding Modes to the xorg.conf, but whatever things I've tried with xorg.conf either seem to be ignored, or prevent X from running.
Also, the 2nd monitor never seems to be detected in the proper way. In Catalyst Control Center, if I click on "Analog Monitor (1)", it will properly identify the display model, say that the max refresh is 85Hz, and identify the connector as VGA. When I click on "Analog Monitor (2)", it identifies the monitor as only "Default Monitor", says the max refresh is 60Hz, and identifies teh connector as DVI. It does not matter which monitor I have connected to which video port, the 1st monitor model is correctly identified and works fine, and the 2nd always is forced to operate at 60Hz or below (I think the two other refresh rates allowed are 43 and 46).
If I had LCD's this wouldn't be an issue, but I won't be doing that (so don't suggest it). I prefer CRT's, and don't think I should have to buy new monitors just because my video card doesn't do what it should.
It is unfortunate that it is so difficult to get video to do what you want in linux. I dream of the day it comes close to being as easy as Windows (but otherwise I find Windows almost unusable).
Thanks to anyone who can help.
Video Card: Asus EAH 3650 Silent, ATI Radeon HD 3650 graphics engine
OS: Ubuntu 9.04 64-bit, all updates complete
Video Drivers: ATI Catalyst 9.9 (latest from ATI website)
Displays: Dell P991 and ViewSonic G90fb (CRT displays, both connected with DVI to VGA adapters)
When originally trying to set up dual displays, I used the proprietary ATI/AMD FGLRX drivers installed through "Hardware Drivers" in ubuntu, but I could never get the displays set up properly, or get Xinerama to turn on. However, I was able to set either display to 1280x1024 @ 85Hz if I messed with things in the right way, but never simultaneously as non-cloned displays. In any event, nothing ever seemed to work consistently.
So I installed the drivers directly from the AMD website (http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx), and everything works much more like it should, with the exception that I am not given the option to set the 2nd monitor to a refresh rate higher than 60Hz. I've tried adding Modes to the xorg.conf, but whatever things I've tried with xorg.conf either seem to be ignored, or prevent X from running.
Also, the 2nd monitor never seems to be detected in the proper way. In Catalyst Control Center, if I click on "Analog Monitor (1)", it will properly identify the display model, say that the max refresh is 85Hz, and identify the connector as VGA. When I click on "Analog Monitor (2)", it identifies the monitor as only "Default Monitor", says the max refresh is 60Hz, and identifies teh connector as DVI. It does not matter which monitor I have connected to which video port, the 1st monitor model is correctly identified and works fine, and the 2nd always is forced to operate at 60Hz or below (I think the two other refresh rates allowed are 43 and 46).
If I had LCD's this wouldn't be an issue, but I won't be doing that (so don't suggest it). I prefer CRT's, and don't think I should have to buy new monitors just because my video card doesn't do what it should.
It is unfortunate that it is so difficult to get video to do what you want in linux. I dream of the day it comes close to being as easy as Windows (but otherwise I find Windows almost unusable).
Thanks to anyone who can help.