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Re: Unsupported X Windows visual??? [message #16905 is a reply to message #16856]

Wed, 25 August 1999 00:00

dirk
Messages: 15
Registered: March 1998

Junior Member

In article <37C184E0.F1B00A6F@ssec.wisc.edu>,
Liam Gumley <Liam.Gumley@ssec.wisc.edu> wrote:
> Todd David Halter wrote:
>> I am running IDL 5.2.1 on a RedHat Linux 6.0 i86 machine with 24bpp. When I do a device,decompose=0 I get the following error:
>> Unsupported X Windows visual (class: PseudoColor, depth: 8).
>> Substituting default (class: TrueColor, Depth: 24).
>> Any ideas on how I can get it to do depth 8 and not depth 24.
>
> While most name-brand Unix consoles (SGI, Sun, IBM etc.) support IDL
> 8-bit PseudoColor while running a 24-bit desktop, Linux does not. At
> least most of the common Linux Xserver packages don't support it (e.g.
> XFree86), although AccleratedX might.
>
> If you *really* want to run IDL in 8-bit PseudoColor mode, you'll need
> to restart your Xserver e.g.
>
> startx -- -bpp 8
>
> Cheers,
> Liam.

Not necessarily. RedHat comes with a little program called Xwrapper that
starts a new X session under the old.

You can be running in 24bpp in one session and then run

Xwrapper :1 -bpp 8 -query localhost

to start a new session in 8bpp. Use Cntrl-Alt-F7 and Cntrl-Alt-F8 to
switch between the two sessions. This prevents any mucking around with
config files and a bit more productivity since you don't have to think "am
i going to need IDL today" before you log in.

Cheers, Dirk

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[Message index]

		Unsupported X Windows visual??? By: Todd David Halter on Mon, 23 August 1999 00:00
		Re: Unsupported X Windows visual??? By: dirk on Wed, 25 August 1999 00:00
		Re: Unsupported X Windows visual??? By: Todd David Halter on Thu, 26 August 1999 00:00

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