how to change color depth from 24 to 16 ?

Tux Rules · 10-06-2010, 11:58 AM

Ok I've tried editing xorg.conf, screen section which looks like this

Code:

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	Monitor    "aticonfig-Monitor[0]-0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection

but without any luck. I need to use the 16 bit color depth, and if I change the value 24 to 16 I get an error when restarting and i have to change it back to 24.

I've already searched on internet about this but although I've found similar problems I've didn't found a conclusive answer yet.

Tux Rules · 10-08-2010, 10:01 AM

ok I can change the Display subsection, Depth parameter from 24 to 16. How can I test to see if I'm really using the 16 bit color depth ?

H_TeXMeX_H · 10-08-2010, 10:29 AM

You should probably look at Xorg.log.

Why exactly would you want to change to 16-bit color depth ?

Tux Rules · 10-30-2010, 12:32 PM

Quote:

Originally Posted by H_TeXMeX_H

You should probably look at Xorg.log.

Why exactly would you want to change to 16-bit color depth ?

Well there's this cool game named Commandos - Destination Berlin. The thing it's that looking through the scope view, because I run the game with wine, the view it's pretty damn colorful more than it should be that's for sure. So I went to wine HQ to see if there's a solution for that and there I saw that the only plausible thing to do it's to switch from using 24 bit color depth to 16.

fbsduser · 10-30-2010, 12:46 PM

Quote:

Originally Posted by Tux Rules

ok I can change the Display subsection, Depth parameter from 24 to 16. How can I test to see if I'm really using the 16 bit color depth ?

Run the game. If it's still acting funny then you're likelly still in 24bit color.

Tux Rules · 10-30-2010, 01:38 PM

Quote:

Originally Posted by fbsduser

Run the game. If it's still acting funny then you're likelly still in 24bit color.

I've did that and it's still acting funny 8-) so I guess modifing the display subsection color depth didn't counted much

H_TeXMeX_H · 10-30-2010, 01:50 PM

So what is your xorg.conf now ?

Tux Rules · 10-30-2010, 02:27 PM

well it's pretty much like this

Code:

Section "ServerLayout"
	Identifier     "aticonfig Layout"
	Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]-0"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Monitor"
	Identifier   "0-CRT2"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
	Option	    "PreferredMode" "1280x1024"
	Option	    "TargetRefresh" "75"
	Option	    "Position" "0 0"
	Option	    "Rotate" "normal"
	Option	    "Disable" "false"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]-0"
	Driver      "fglrx"
	Option	    "Monitor-CRT2" "0-CRT2"
	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     16
	EndSubSection
EndSection

I have to admit that after modifying the Display subsection Depth color depth from 24 to 16 at least at the first few seconds of playing the game the scope looked alright after that it becomed pretty damn colorful as always. So I guess the secret lays in changing the DefaultDepth but as I've already specified if I do that I get a huge xorg error when I restart.

Tux Rules · 10-30-2010, 02:27 PM

well it's pretty much like this

Code:

Section "ServerLayout"
	Identifier     "aticonfig Layout"
	Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]-0"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
EndSection

Section "Monitor"
	Identifier   "0-CRT2"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
	Option	    "PreferredMode" "1280x1024"
	Option	    "TargetRefresh" "75"
	Option	    "Position" "0 0"
	Option	    "Rotate" "normal"
	Option	    "Disable" "false"
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]-0"
	Driver      "fglrx"
	Option	    "Monitor-CRT2" "0-CRT2"
	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     16
	EndSubSection
EndSection

I have to admit that after modifying the Display subsection Depth color depth from 24 to 16 at least at the first few seconds of playing the game the scope looked alright after that it becomed pretty damn colorful as always. So I guess the secret lays in changing the DefaultDepth but as I've already specified if I do that I get a huge xorg error when I restart.

H_TeXMeX_H · 10-30-2010, 03:21 PM

What error ? Can you post it ?

You may need to add some resolution options for it.

Tux Rules · 10-30-2010, 03:49 PM

Quote:

Originally Posted by H_TeXMeX_H

What error ? Can you post it ?

You may need to add some resolution options for it.

sure if I change the DefaultDepth from 24 to 16 after I rebot I get something like that

Code:

Failed to start x sever 
(your graphical interface) 
it is likely that it is not 
set up correctly. Would you like 
to view the x server output 
to diagnose the problem ?

and I choose yes, why not heh 
8-) and at the error lines 
I get something like

(EE) fglrx(0): Given depth(16) is not supported by fglrx driver
(EE) fglrx(0): PreInitVisual failed
(EE) fglrx(0): PreInit failed
(EE) fglrx(0): Screen(s) found but none have unusable configuration

followed by other meaningless lines that at least are not flaged as errors but most likely are a consequence to those errors

H_TeXMeX_H · 10-31-2010, 04:42 AM

Well, looks like fglrx is crap:

Code:

(EE) fglrx(0): Given depth(16) is not supported by fglrx driver

Maybe try radeon, but then the game in wine will probably not work.

Tux Rules · 10-31-2010, 06:06 AM

Quote:

Originally Posted by H_TeXMeX_H

Well, looks like fglrx is crap:

Code:

(EE) fglrx(0): Given depth(16) is not supported by fglrx driver

Maybe try radeon, but then the game in wine will probably not work.

As I observed my display can switch from 24 display color depth to 16 if the application demands it, I don't really get it why it doesn't wanna start in 16 bit color depth, and sadly the game really lacks in setups, it doesn't even have a video setup for resolution. Anyway it's not such of a big deal.