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zwer's Avatar
zwer is offline zwer
2010-03-25 , 18:36
Posts: 455 | Thanked: 782 times | Joined on Nov 2009 @ Netherlands
#61
You cannot change the bit depth, unless you want to break all the software on your device - framebuffer is set to 16bit, and all the applications expect it to be, which is quite reasonable - using 18bit instead of 16bit is an entrance to a whole world of pain when it comes to programming and no sane programmer would use it.
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javispedro's Avatar
javispedro is offline javispedro
2010-03-25 , 20:12
Posts: 2,355 | Thanked: 5,249 times | Joined on Jan 2009 @ Barcelona
#62
Changing the depth in Fremantle would break hildon-desktop mostly, but not every program.

In the doable realm is trying to show something in the LCD at a higher depth than 16bpp (NOT the system UI), AFAIU the controller supports 24bpp framebuffers. How to tell if the actual LCD panel is 16 or 18 is over me though.
 
maxximuscool is offline maxximuscool
2010-03-25 , 21:38
Posts: 3,664 | Thanked: 1,530 times | Joined on Sep 2009 @ Hamilton, New Zealand
#63
yeah would be great if we can somehow hack this to make the N900 running at 24bits depth without breaking anything. But how?

It's bother-some me so much with the 65k colours.
 
lennartb's Avatar
lennartb is offline lennartb
2010-03-25 , 22:58
Posts: 77 | Thanked: 71 times | Joined on Feb 2010 @ Groningen, Netherlands
#64
Gradients can turn out horrible on the screen I've noticed
 
lma is offline lma
2010-03-25 , 23:04
Posts: 2,802 | Thanked: 4,491 times | Joined on Nov 2007
#65
Originally Posted by javispedro View Post
How to tell if the actual LCD panel is 16 or 18 is over me though.
At least on my summit loaner dmesg reports:

Code:
omapfb: acx565akm rev 8b LCD detected
I didn't manage to find any specs on this, but the Fremantle driver code for that panel contains an #ifed-out acx565akm_set_mode() that allegedly handles 16/18/24bpp and this comment:

Code:
* supported modes: 12bpp(444), 16bpp(565), 18bpp(666),  24bpp(888)
On the other hand the version that was submitted to linux-omap a couple of days ago doesn't contain either of the above.
 

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maxximuscool is offline maxximuscool
2010-03-25 , 23:33
Posts: 3,664 | Thanked: 1,530 times | Joined on Sep 2009 @ Hamilton, New Zealand
#66
Originally Posted by lennartb View Post
Gradients can turn out horrible on the screen I've noticed
Yes I've noticed that too. Especially on Maemo Forum tabs gradient. All become a series of colours stacking up
 
maxximuscool is offline maxximuscool
2010-03-25 , 23:37
Posts: 3,664 | Thanked: 1,530 times | Joined on Sep 2009 @ Hamilton, New Zealand
#67
Mind to share the command here? I want to see what mine say

Even windows XP running at 32bits colour.
Last edited by maxximuscool; 2010-03-26 at 00:20.
 
javispedro's Avatar
javispedro is offline javispedro
2010-03-25 , 23:51
Posts: 2,355 | Thanked: 5,249 times | Joined on Jan 2009 @ Barcelona
#68
Originally Posted by lma View Post
allegedly handles 16/18/24bpp and this comment
I couldn't find any info about the panel either, other than it being a Sony "low power" one (thus I really doubt it handles 24bpp). So we don't know what it really handles.
 
Elhana is offline Elhana
2010-03-25 , 23:52
Posts: 97 | Thanked: 30 times | Joined on Dec 2009 @ Russia, Moscow
#69
Test for you: http://www.lagom.nl/lcd-test/gradient.php

Before saying N900 screen is bad, go check your desktop screen.

Even my old IPS gaming display (NEC 20WGX) is not perfect in that test. Looks clean on 2490WUXi... and hence the price.

I'm more than happy with a current color depth since I can't really tell the difference for normal use case.
 

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maxximuscool is offline maxximuscool
2010-03-26 , 00:13
Posts: 3,664 | Thanked: 1,530 times | Joined on Sep 2009 @ Hamilton, New Zealand
#70
Originally Posted by Elhana View Post
Test for you: http://www.lagom.nl/lcd-test/gradient.php

Before saying N900 screen is bad, go check your desktop screen.
??????????????????????
gradient is quite visible on mine. Badly blocks with even the black and white picture. My Dell Monitor with a crappy machine that cant even watch Youtube still produce better gradient than my N900.

This picture below is from a crappy no graphic card PC.
Attached Images
 
Last edited by maxximuscool; 2010-03-26 at 00:19.
 
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