How do I set up nvidia graphics adapter to put out 1080p, it seems to be using interlace mode>

Posted by keepitsimpleengineer on Ask Ubuntu See other posts from Ask Ubuntu or by keepitsimpleengineer
Published on 2012-07-03T00:15:45Z Indexed on 2012/07/05 3:23 UTC
Read the original article Hit count: 326

Filed under:

12.04

|

nvidia

|

xorg

|

hdmi

|

hdtv

After upgrading to 12.04, my mythbuntu client/server seems to be running in 1080i, the clue comes from:

[  1176.117] (II) NVIDIA(0): Setting mode "1920x1080_60i"
[  1231.340] (II) NVIDIA(0): Setting mode "DFP-1:1920x1080_60@1920x1080+0+0"

This is from Xorg.0.log.

This whole thing started from video tearing when watching Mythtv recordings. It didn't happen in 10.10.

Should I use "TVStandard" "HD1080p" in the screen section since this is a dedicated HTPC? It only connects to an HDTV (1080p) via hdmi.

Here is the current xorg.conf file:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 270.29  (buildd@allspice)  Fri Feb 25 14:42:07 UTC 2011

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
# commented out by update-manager, HAL is now used and auto-detects devices
# Keyboard settings are now read from /etc/default/console-setup
#    InputDevice    "Keyboard0" "CoreKeyboard"
# commented out by update-manager, HAL is now used and auto-detects devices
# Keyboard settings are now read from /etc/default/console-setup
#    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
    FontPath        "unix/:7100"
EndSection

# commented out by update-manager, HAL is now used and auto-detects devices
# Keyboard settings are now read from /etc/default/console-setup
#Section "InputDevice"
#    # generated from default
#    Identifier     "Mouse0"
#    Driver         "mouse"
#    Option         "Protocol" "auto"
#    Option         "Device" "/dev/psaux"
#    Option         "Emulate3Buttons" "no"
#    Option         "ZAxisMapping" "4 5"
#EndSection

# commented out by update-manager, HAL is now used and auto-detects devices
# Keyboard settings are now read from /etc/default/console-setup
#Section "InputDevice"
#    # generated from default
#    Identifier     "Keyboard0"
#    Driver         "kbd"
#EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "SAMSUNG"
    HorizSync       26.0 - 81.0
    VertRefresh     24.0 - 75.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 240"
    Option         "TripleBuffer" "1"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "DFP: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

After a little digging, the question changes slightly, to wit...

Per Chapter 19 of nvidia README...

"If the EDID for the display device reported a preferred mode timing, and that mode timing is considered a valid mode, then that mode is used as the "nvidia-auto-select" mode."

The EDID for my HDMI connected LCD monitor says use first device as preferred.

 Prefer first detailed timing : Yes

Also:

(--) NVIDIA(0): EDID maximum pixel clock     : 230.0 MHz

The list: (from startx -- -verbose 6 )

(--) NVIDIA(0): Detailed Timings:
(--) NVIDIA(0):   1920 x 1080 @ 60 Hz
(--) NVIDIA(0):     Pixel Clock      : 148.50 MHz
(--) NVIDIA(0):     HRes, HSyncStart : 1920, 2008
(--) NVIDIA(0):     HSyncEnd, HTotal : 2052, 2200
(--) NVIDIA(0):     VRes, VSyncStart : 1080, 1084
(--) NVIDIA(0):     VSyncEnd, VTotal : 1089, 1125
(--) NVIDIA(0):     H/V Polarity     : +/+

This is the actual mode selected: (from xorg.0.log)

(--) NVIDIA(0):   1920 x 1080 @ 60 Hz
(--) NVIDIA(0):     Pixel Clock      : 74.18 MHz
(--) NVIDIA(0):     HRes, HSyncStart : 1920, 2008
(--) NVIDIA(0):     HSyncEnd, HTotal : 2052, 2200
(--) NVIDIA(0):     VRes, VSyncStart : 1080, 1084
(--) NVIDIA(0):     VSyncEnd, VTotal : 1094, 1124
(--) NVIDIA(0):     H/V Polarity     : +/+
(--) NVIDIA(0):     Extra            : Interlaced
(--) NVIDIA(0):     CEA Format       : 5

So my HTPC is down-converting to 1080i and then the Monitor is up-converting to 1080p

How can I fix this, please?

Developer IT