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I have an older PC with a small cheap monitor, a Sampo AlphaScan 411. I have three different Linux partitions, my usual day-to-day distro being Mepis with kernel 2.4.29. Here's my question:
On this partition, in an XWindows session, i can acheive pretty decent resolution (1024x768) if i specify
in the "Screen" Section of XF86Config-4.
Trouble with this is some applications like Mozilla and Gimp require at least 16 color bits to display correctly. If i specify
i can't get the same resolution. In this case, none of my Modeline parameters seem to matter; the X system just uses some kind of default, depending upon the driver specified in the "Device" section of XF86Config-4. I've only found two driver specifications that work: "trident" and "vesa". If i specify "vesa", i get 800x600 resolution, and a constant flicker, no matter how i try to tweak the vsync and hsync parameters. If i specify "trident", i get no flicker, but some ridiculously low resolution, possibly 640x400.
Now, to make things interesting, i can get both 1024x768 resolution with no flicker and 16 color bits in an older distro on the same machine - Red Hat with 2.2.16-22 kernel. The XF86Config file there specifies a "svga" driver, which seems to be unavailable in the Mepis system.
After much tinkering, i am convinced as my relative ignorance allows me to be, that the "svga" or equivalent X11 video driver is what i need over in my Mepis system. Is this compiled into the kernel itself, or where can i find it? Or can this driver not be used with the newer kernel? Or, are my convictions about the driver unfounded, and my problem lies elsewhere? How do i tweak the XF86Config-4 to get both 16-bit color and 1024x768 resolution? Or, is there some fundamental difference between the way the older XF86Config file and the newer XF86Config-4 file do things?
Here are the relevant lines from the Mepis XF86Config-4 file:
When specifying a color depth of 16 - Using the "vesa" driver gives me 800x600 regardless of what i specify for resolution, but with a bad flicker. Using the "trident" driver gives me 600x480 regardless of what i specify. The original file specified 1024x768 as you suggested, and so i changed it to 800x600 as my attempt to get at least that much resolution, without the flicker. Didn't work, but that's the state it was in when i posted this thread.
Tried running it, both in an X 'run' window, and as root in a command-line terminal. In both cases, that command is not found.
Let me emphasize what i experienced in playing with the XF86Config-4 file: At one point, i copied all the relevant sections from the older Red Hat partition, so that all Modelines, resolution specs, etc, were identical. My newer Mepis X complained that it could not find the driver "svga". So i tried both "vesa" and "trident" as my device driver, with the results as noted above
Can i assume that, were i to obtain the "svga" driver used in the Red Hat system, that my problems would be solved? I suppose it's not that simple. I'd like to try that, but i haven't a clue where i might find this driver. Is it compiled into the kernel?