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Old 10-25-2008, 06:45 AM   #1
vpv
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SVGATextMode with Intel 82845G Graphics Controller


Hi,

I use Debian Sarge in console-only mode i.e. no X. I would like to increase the vertical frequency of my monitor from 60 Hz to 85 Hz. The model of my monitor is Dell E771a and it supports vertical freq. up to 160 Hz. My machine is Dell™ OptiPlex™ GX260. It has onboard Intel® 82845G Graphics Controller. I installed svgatextmode. It created a file /etc/TextConfig which I have to edit in order to change my monitor frequency. However in it i don't find the model of my graphic controller chipset Intel 82845G. Do you know if it is possible to increase my monitor frequency to 85Hz in console mode using svgatextmode with my hardware? (Under X it is certainly possible.)

Thank you.
 
Old 10-27-2008, 05:20 AM   #2
pinniped
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Since you have an Intel 82845G, I would recommend using the Intel Framebuffer driver (intelfb) rather than svgatextmode. On the boot line you can say:

video=intelfb:1200x800-32@85

1200x800 resolution, 32bits per pixel (color mode), 85Hz refresh rate

If you have the kernel source, have a look at the file Documentation/fb/intelfb.txt
 
Old 10-31-2008, 02:51 AM   #3
vpv
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Quote:
Originally Posted by pinniped View Post
Since you have an Intel 82845G, I would recommend using the Intel Framebuffer driver (intelfb) rather than svgatextmode. On the boot line you can say:

video=intelfb:1200x800-32@85

1200x800 resolution, 32bits per pixel (color mode), 85Hz refresh rate

If you have the kernel source, have a look at the file Documentation/fb/intelfb.txt
Thanks for your reply. I added video=intelfb:1200x800-32@85 to my boot line in grub. As a result the vertical frequency increased from 60Hz to 70Hz, but not 85Hz. Also the screen resoltion did not change but stayed 800x640. I added 'vga=790' (for resolution 1024x768x256) to the above. Then the resolution changed accordingly but the frequency turned back to 60Hz. I also experimented with other resolutions which i saw in intelfb.txt, but the monitor frequency never goes over 70HZ and i cannot have both high frequency (70Hz) and high resolution (anything other than 800x640).

Do you know if I can have both vert. freq. 85Hz and console screen resoltion 1024x768 for video chipset Intel 845G and monitor Dell GX260?

Thanks!
 
  


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