checking the refresh rates with Hannsg for my HW191 D monitor....
Dear folks,
I recently got my Hannsg HW 191D monitor working at its full resolution of 1440 x 900 driven by my new AMD64 dual core super duper box with an 8600GT nvidia card on it etc that I unboxed last wee.
I am cheating a little bit because I am only using the nv driver in Xorg not the nvidia driver itself. I have to modify the kernel according to the Debian Nvidia howto and install the nvidia glx drivers etc.
But even as it is it is driving the monitor excellently in terms of the 2-D images it is producing for browser windows and OpenOffice files.
I am delighted with this and am also grateful to Lennart Sorenson for pointing out that I had entered the wrong resolution for this monitor.
I have fixed this. I am sure it will work OK when I install the true nvidia drivers.
But now I am wondering if I might be harming the monitor by not having the correct horizontal and vertical refresh rate ranges specified in the Xorg file.........
So I sent an email to Hannsg about this and they responded.
They sent me a pdf file with a copy of page 20 of their manual for this monitor. I got small leaflet not a manual sent with the monitor, although there was a CD in the box with monitor installation stuff in it.
I assumed this would only be for MS Windows users. But maybe there was a longer manual provided on the CD, but not included with the monitor as a printed document that anyone, including a Linux user might make use of.
I will investigate this.
The pdf file has a table in it with what is referred to as a factory preset timing table.
It contains the following entries:
HORIZONTAL VERTICAL
TIMING MODE
FREQUENCY (kHz) FREQUENCY (Hz)
640x350 VGA-350 31.469 70.087
640x400 VGA-GRAPH 31.469 70.087
640x400 NEC PC9821 31.5 70.15
640x480 VGA-480 31.469 59.94
640x480 APPLE MAC-480 35.00 66.67
640x480 VESA-480-72Hz 37.861 72.809
640x480 VESA-480-75Hz 37.5 75
720x400 VGA-400-TEXT 31.469 70.087
832x624 APPLE MAC-800 49.725 74.55
800x600 SVGA 35.156 56.25
800x600 VESA-600-60Hz 37.879 60.317
800x600 VESA-600-72Hz 48.077 72.188
800x600 VESA-600-75Hz 46.875 75
1024x768 XGA 48.363 60.004
1024x768 COMPAQ-XGA 53.964 66.132
1024x768 VESA-768-70Hz 56.476 70.069
1024x768 VESA-768-75Hz 60.023 75.029
1024x768 APPLE MAC-768 60.24 75.02
1152x864 75Hz 67.50 75.00
1280x960 60Hz 60.00 60.00
1280x1024 VESA-1024-60Hz 64 60
1280x1024 VESA-1024-75Hz 80 75
1440x900 VESA-1440-60Hz 55.935 59.887
1440x900 VESA-1440-75Hz 70.635 75
I have tried to tidy it up after pasting it in here.....
Since I want to run the monitor at its highest resolution (1440 x 900); then does this mean that the last two entries can be combined to give the following horizontal and vertical scan frequencies for the monitor at 1440 x900 resolution:
Horizontal 55.935 - 70.635 kHz
Vertical 59.887 - 75 Hz
and I could put these numbers in the Xorg file (or in the debconf boxes under the Advanced settings for configuring the monitor using the dpkg-reconfigure xserver-xorg command?
I am concerned that I may be harming the monitor by using incorrect sync rates as kindly pointed out by a Mr Isaacs in a previous posting on the list here.
Regards
Michael Fothergill
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http://clk.atdmt.com/UKM/go/msnnkmgl0010000007ukm/direct/01/
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