My problem (maybe specific to my system): MythTV menus require brightness settings to be very low, otherwise text is washed out, not sharp, and mostly unreadable. Setting brightness to minimum via nvidia-settings fixes this problem. But creates a second problem: watching actual video (not menus) things are way too dark.
Attempted solution: use
nvidia-settings to set brightness way down for best menu display, use
nvidia-settings XV overlay settings to re-brighten video.
I'm looking for some help either in (1) implementing the above solution, or (2) some other solution to my problem.
The above solution is theoretical at this point, I am having problems implementing it for testing. Specifically, my TV is hooked up to s-video output ("screen 1" in X) and my monitor is hooked up to VGA output ("screen 0" in X). Nvidia says overlays are only supported on screen 0.
From the NVIDIA documentation:
Quote:
The video overlay only works on the first display device on which you started X ... To work around this, you can either configure the video application to use the "Video Blitter" adaptor advertised through the XV extension (this is always available), ...
I can see this "Video Blitter" adaptor they mention:
Code:
$ xvinfo | egrep "(screen|Adaptor)"
screen #0
Adaptor #0: "NV17 Video Overlay"
Adaptor #1: "NV17 Video Texture"
Adaptor #2: "NV05 Video Blitter"
Adaptor #3: "NVIDIA Video Interface Port"
screen #1
Adaptor #0: "NV17 Video Texture"
Adaptor #1: "NV05 Video Blitter"
$
... but I have no idea how I'm supposed to make the application use this adaptor.Is this adaptor setting something I can force via the environmental DISPLAY variable? I can find no documentation on how to force use of a specific adaptor.
Here's how I start the frontend (I'm currently using irxevent due to problems in lirc_client specific to my system - irxevent is my temporary workaround).
Code:
DISPLAY=:0.1 /usr/local/bin/irxevent &
DISPLAY=:0.1 /usr/local/bin/mythfrontend
Relevent sections from my xorg.conf file (other sections omitted for conciseness):
Code:
# distribution: Debian SID
# kernel: 2.6.14-1-686
# nVidia driver: 1.0-7676
# graphics card: eVGA nVidia GeForce4 MX4000 AGP 8x 64Mb; outputs: VGA, S-video
Section "Device"
Identifier "nVidia MX4000 (VGA output)"
Driver "nvidia"
BusID "PCI:1:0:0"
Screen 0
Option "NoLogo" "True"
Option "ConnectedMonitor" "CRT"
EndSection
Section "Device"
Identifier "nVidia MX4000 (SVIDEO output)"
Driver "nvidia"
BusID "PCI:1:0:0"
Screen 1
Option "NoLogo" "True"
Option "ConnectedMonitor" "TV"
Option "TVStandard" "NTSC-M"
Option "TVOutFormat" "SVIDEO"
EndSection
Section "Monitor"
Identifier "CRT"
VendorName "NEC"
ModelName "Multisync-70"
Option "DPMS"
HorizSync 31-69
# NEC states optimal at 1024x768@75Hz, set lower VertRefresh to force it
# Actual VertRefresh specs for this monitor are 55-120
VertRefresh 55-75
# Set DisplaySize for 96 DPI at 1024x768
# 96 DPI: calculated (1024*25.4)/96 = 270 and (768*25.4)/96 = 203
DisplaySize 270 203
EndSection
Section "Monitor"
Identifier "TV"
VendorName "Mitsubishi"
ModelName "60 inch rear projection TV"
HorizSync 30-50
VertRefresh 60
# Set DisplaySize for 96 DPI at 640x480
# 96 DPI: calculated (640*25.4)/96 = 169 and (480*25.4)/96 = 127
DisplaySize 169 127
#Modeline "640x480@60" 24.11 640 672 760 792 480 490 495 505
EndSection
Section "Screen"
Identifier "Computer Monitor"
Device "nVidia MX4000 (VGA output)"
Monitor "CRT"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Section "Screen"
Identifier "Television"
Device "nVidia MX4000 (SVIDEO output)"
Monitor "TV"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "640x480"
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default"
Screen 0 "Computer Monitor"
Screen 1 "Television"
InputDevice "AOpen keyboard"
InputDevice "Logitech mouse"
EndSection
View unanswered posts
View active topics
Print view
Previous topic Next topic 
LinHES Home
Board index
FAQ
Search
Login 
Register
