[mythtv-users] Computer can't read EDID from Panasonic TC-P42C1

[Chris]

Hello Everyone,

I have been asking this question on Linux Questions and I have received 
some advice from one kind soul but nothing seems to be working. I was 
thinking that people here might be more accustomed to dealing with this 
type of issue.  Below is a cut and paste of my original post on Linux 
questions.  If you follow the thread we've tried the follow:

1) adding  "Modes    "1600x1200" "1280x1024" "1024x768" "800x600" 
"640x480" to xorg.cong"
2) removed and blacklisted the nouveau drivers
3) update grub
4) update the initramfs
5) on my own I changed settings in the xorg.conf to HorizSync 15.73 - 67.5
     VertRefresh     23.98 - 60.00 based on information I got from my 
manual.
6) I also tried to create a new mode in xrandr that I got from 
http://www.mythtv.org/wiki/Modeline_Database but no joy.

As always thank you for any help you can provide.

Chris

_ORIGINAL QUESTION:_
I've just loaded Ubuntu 12.04 on a new(used) HTPC which I have hooked up 
to a Panasonic TV (this is to be used as a MythTV frontend). The TV's 
max resolution is 1024x768 but the option isn't available in X-server or 
the Ubuntu display controls. It is currently set at 1280x720 and 
subsequently the controls are not completely visible on screen 
(overscan) making it very difficult to work with.

The output graphic controller is :NVIDIA Corporation C77 [GeForce 8200] 
(rev a2) (I don't know if you need any more information).

I tried the below (sorry I forgot how to get it into the little 
scrollable box) taken from the following website 
(http://ubuntuforums.org/showthread.p...ar#post8595940 
<http://ubuntuforums.org/showthread.php?p=8595940&mode=linear#post8595940>) 
but as you can see I came to a dead end.

Any help anyone could provide would be greatly appreciated.


chris at HTPC-1:~$ xrandr
Screen 0: minimum 8 x 8, current 1280 x 720, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1280x720+0+0 (normal left inverted right x axis y axis) 
698mm x 392mm
1280x720 60.0*+ 59.9
1920x1080 60.0 59.9 24.0 30.0 30.0
1440x480 30.0
720x480 59.9 30.0
640x480 59.9
"1024x768_60.00" (0x280) 63.5MHz
h: width 1024 start 1072 end 1176 total 1328 skew 0 clock 47.8KHz
v: height 768 start 771 end 775 total 798 clock 59.9Hz
chris at HTPC-1:~$ cvt 1024 768
# 1024x768 59.92 Hz (CVT 0.79M3) hsync: 47.82 kHz; pclk: 63.50 MHz
Modeline "1024x768_60.00" 63.50 1024 1072 1176 1328 768 771 775 798 
-hsync +vsync
chris at HTPC-1:~$ xrandr --newmode "1024x768_60.00" 63.50 1024 1072 1176 
1328 768 771 775 798 -hsync +vsyn
chris at HTPC-1:~$ xrandr --addmode HDMI-0 1024x768_60.00
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 25
Current serial number in output stream: 26
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20130312/7db2cc8c/attachment.html>