Video too dark in xbmcbuntu nvidia ion acer revo r1600
#1
I have been running xbmc on my acer revo 1600 in Windows 7 for some time now but I recently switched it over to xbmcbuntu.
The problem is that the video settings are way too dark in xbmc menu and when playing videos.
In Windows 7 I corrected this by making the needed changes in the nvidia ion control panel.
If I log out of xbmc and log into xbmcbuntu I can open the nvidia ion control panel in xbmcbuntu and make adjustments to gamma contrast and brightness.
However, the changes do not carry over to xbmc when I log back into xbmc.
I suppose I need a way to open the nvidia control panel in xbmc but I don't know how I can do this.
I know you can adjust the brightness and contrast when playing a video and tell xbmc to make this the default setting for all videos but this does not correct the darkness within the xbmc menu.
What can I do?


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#2
One reason might be that you have your TV connected via HDMI and it does not support full range. In this case you can set color range to limited in xorg.conf:
Option "ColorRange" "Limited"
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#3
I used putty to log in and typed sudo nano /etc/X11/xorg.conf
In the Section "Screen" I added:
Option "ColorRange" "Limited"
Option "ColorSpace" "YCbCr444"

There seems to be an improvement but I still had to boost brightness to 56 and contrast to 55
and the menus still look too a little too dark to me.


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#4
Don't add this: Option "ColorSpace" "YCbCr444". It makes absolutely no sense.
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#5
I have tried it with and without Option "ColorSpace" "YCbCr444"

I have to say that I think it looks better with Option "ColorSpace" "YCbCr444"

I was just going by what I saw in these threads:

http://forum.xbmc.org/showthread.php?tid=83211&page=2

http://forum.xbmc.org/showthread.php?tid=106052

http://forum.xbmc.org/showthread.php?tid=137643
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#6
YCbCr444 adds just an additional conversion, leave it to RGB.

The changes you make in nvidia-settings are per user. Those changes don't get applied until you load the settings with nvidia-settings -l. Make color adjustments with the user who runs xbmc, then load settings before starting xbmc.
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#7
I had issues with dark scenes and had to disable dynamic contract or some such on the TV. Perhaps this is different though...
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#8
When I log in as xbmc it goes straight to the xbmc. I don't know how to.get to nvidia control this way.
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#9
* un1versal points to http://forum.xbmc.org/showthread.php?tid=129569

Once in the WM you can find what your looking for.

uNi
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#10
I think that won't help if a user desires to boot directly into XBMC without a WM. You would need to modify xbmc-standalone script or place your own script into the desktop session.
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#11
(2012-11-07, 12:26)uNiversal Wrote: * uNiversal points to http://forum.xbmc.org/showthread.php?tid=129569

Once in the WM you can find what your looking for.

uNi

I switched from Windows 7 to ubuntu to hopefully squeeze a little more power from the Acer 1600
Do you think running it this way would put an extra demand on the machine?
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#12
bump
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#13
Its the other way around, windows is more demanding than Ubuntu on any machine.

Linux doesn't "squeeze" more or less, it is simply more efficient and not as resource intensive as windows.

Personally I "squeeze" even more, since I use minimal Ubuntu installs + xbmc install script with upstart on my ION machine though yours is a single core mine is dual core but should work just fine.

Details on my signature for further reading and information only, use only if your really really want to.

uNi
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#14
Sorry, I guess I didn't clearly explain what I was thinking when I wrote that.

I know that Linux is less demanding on the machine which is the reason I switched from Windows 7 to Linux.

What I was asking is whether loading Linux desktop and then loading xbmc is more demanding on the system than booting directly into xbmc.
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#15
Do don't need to run a window manager.
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Video too dark in xbmcbuntu nvidia ion acer revo r16000