I need help adjusting the gamma of my monitor. I've tried four methods
without success:

(1) The man page for XF86Config(5) documents the optional entries "Gamma
x" or Gamma r g b" in the XF86Config file which should set the monitor's
gamma (x, r, g, and b being between 0.1 and 10.0, default 1). I tried
both variants as root but nothing happened either time... but since the
man page warns that "Not all drivers are capable of using this
information," I assume I'm out of luck here. Has anyone had luck with
these entries?

I have not one but three XF86Config files, not counting backups:

/etc/XF86Config
/etc/X11/XF86Config
/etc/X11/XF86Config-4

I assume that multiple files are to provide different configurations
under different circumstances. In any case I edited them all
identically.

For what it's worth, "XFree86 -version" reports:

XFree86 Version 4.1.0 / X Window System
(protocol Version 11, revision 0, vendor release 6510)
Release Date: 2 June 2001
Build Operating System: Linux 2.4.8-5mdkenterprise i686 [ELF]
Module Loader present

(2) My display adapter is a SiS620, which is supported by XFree86. Just
for laughs I downloaded and installed the 620 driver from SiS (yes, they
have Linux drivers) but there's no change.

(3) The man page for XFree86(1) documents the command line switch
-gamma. I normally work in X, so first I tried switching to tty1 with
Ctrl-Alt-F1, logging in as another user, and entering "XFree86 -gamma
9.0", which returned:

Fatal server error:
Server is already active for display 0

I thought it was possible to run multiple instances of X, but I clearly
did something wrong here. (I'd like to know what, as eventually I will
want to have multiple instances... but that's another issue.)

Then, I changed my boot configuration to not boot into X, rebooted and
logged in, and gave the above command. X hung: the same moir� pattern
appeared that always does when X is starting, but hung there. The result
is the same when I simply enter "XFree86" from the command line without
the -gamma switch.

(4) From an xterm, I gave the command "xgamma -gamma 9.0", which
returned:

Xserver is running an old XFree86-VidModeExtension version (0.8)
Minimum required version is 2.0

I did a web search on the above message but the only hits I found were
for dead (404) pages.

Ideas, anyone? I'm stumped, and in the meantime I'm stuck with a barely
legible display.
--
Warren Post
Santa Rosa de Copan, Honduras
http://www.srcopan.vze.com/






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