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  #1  
Old 14th February 2012, 08:53 AM
NargJob Offline
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Fedora 16 welcome screen. Choose color depth session

Hello! I have a specific task that sometimes I need to log in my KDE session with 8 bit color depth. But mostly I work with 24 color depth of course. So, the question is such: I need an option in a welcome screen to choose a color depth I will have during my session. Is it possible?
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Old 14th February 2012, 10:52 PM
griffinmt Offline
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Re: Fedora 16 welcome screen. Choose color depth session

Untill you get a preferred answer to this (likely need some coding), why not set the default screen to be 8 bit depth and after login, change to 24 bit for that session.
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Old 14th February 2012, 10:58 PM
sea Online
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Re: Fedora 16 welcome screen. Choose color depth session

Me sleepy, but how about having another account for that specific task, where that user has a setting ofr 8 bit color depth?
Or, executing that task in a VM?
I cant think of a task that requires, was that, 256 colors for the GUI?
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Old 15th February 2012, 04:17 AM
NargJob Offline
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Re: Fedora 16 welcome screen. Choose color depth session

Quote:
Originally Posted by sea View Post
Me sleepy, but how about having another account for that specific task, where that user has a setting ofr 8 bit color depth?
Or, executing that task in a VM?
I cant think of a task that requires, was that, 256 colors for the GUI?
It's a specific task for embedded software that should be debugged on PC and needs 8-bit color depth.

So no standard solution for this?
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Old 15th February 2012, 04:53 AM
sonoran Offline
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Re: Fedora 16 welcome screen. Choose color depth session

Edit your kernel boot parameters in grub and add "vga= " a value from here:
http://en.wikipedia.org/wiki/VESA_BIOS_Extensions

To maintain that value you might have to write an xorg.conf specifying resolution and bitplane depth. See man xorg.conf.

***************
I don't know how you would do that from the login screen, but you could do it at boot by creating a
new grub menu entry that would boot the kernel with your vga=x parameter.

Last edited by sonoran; 15th February 2012 at 04:58 AM.
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Old 15th February 2012, 06:09 AM
NargJob Offline
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Re: Fedora 16 welcome screen. Choose color depth session

Quote:
Originally Posted by sonoran View Post
Edit your kernel boot parameters in grub and add "vga= " a value from here:
http://en.wikipedia.org/wiki/VESA_BIOS_Extensions

To maintain that value you might have to write an xorg.conf specifying resolution and bitplane depth. See man xorg.conf.

***************
I don't know how you would do that from the login screen, but you could do it at boot by creating a
new grub menu entry that would boot the kernel with your vga=x parameter.
Hm. Nice idea. I'll definitely try it out today! Thanx!
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Old 15th February 2012, 08:17 AM
sonoran Offline
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Re: Fedora 16 welcome screen. Choose color depth session

It might be possible to accomplish this from the login window by defining multiple screens in the xorg.conf file
and giving them Identifiers, then creating .xserverrc files in the home dirs of different users, and passing the
desired screen Identifier to the X server as a parameter using the -screen command line option.

So your xorg.conf would define 2 screens - one 8-bit identified as, say "8B", and another the standard 24- or 32-bit
screen, id'd as "24B".

Then in the home dir of your 8-bit user, create an .xserverrc file such as:
Code:
exec /user/bin/X -screen "8B" -nolisten tcp "$@"
Then edit the /etc/X11/xinit/xserverrc and add "-screen "24B"", which should apply to all other users.

So when you log in as 8-bit user, you would get that screen, and all others would get a normal screen.

***DISCLAIMER: I haven't tried this, use it at your own risk. (what's the worst that could happen?)
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Old 15th February 2012, 08:21 AM
andres29 Offline
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Re: Fedora 16 welcome screen. Choose color depth session

hi to all.. someone help to fix port22 error everytime i connect via remote desktop or even pinging other fedora users.. thanks
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Old 15th February 2012, 11:07 AM
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Re: Fedora 16 welcome screen. Choose color depth session

Quote:
Originally Posted by andres29 View Post
hi to all.. someone help to fix port22 error everytime i connect via remote desktop or even pinging other fedora users.. thanks
andres29. Please read the Posting Rules. Don't hijack threads. Start a new thread in the proper forum with a descriptive title. This thread has nothing to do with "port 22".
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  #10  
Old 22nd February 2012, 03:31 PM
NargJob Offline
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Re: Fedora 16 welcome screen. Choose color depth session

Big thanks to all for help! Solved!
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