On 21/04/13 00:46, Tyler J. Wagner wrote:
Sounds similar to a problem I had with my TV. It's EDID incorrectly lists
only one mode (1280x720 50 Hz), but it supports up to 1920x1080 at a
variety of refresh rates. I verified this by dumping the EDID and checking it.
I wrote up my experience here:
http://www.tolaris.com/2009/04/14/enabling-1080p-video-on-the-shuttle-x27d-htpc/
However, this may not be your problem. For one, I no longer have this issue
on precise or quantal. The display defaulted to 1280x720 but I was able to
use the "Displays" application to set it to the higher resolution by
selecting it from the pull-down menu.
If it does apply to you, I hope the post helps. You can at least check your
EDID data or force a mode in various ways.
Regards,
Tyler
On 2013-04-20 17:34, pete smout wrote:
Hi,
I have been trying without success to get my ubuntu precise (upgraded from
oneric) to accept the same resolution on my tv as 10.04 (Lucid) did. (I
still have lucid on a spare hdd so I can check settings).
The Problem:
TV (when connected via VGA (Out on laptop)- VGA (PC input)on TV)
On Lucid resolution was 1360 x 768 (16:9) 60hz. which worked perfectly well
(with virtually zero input from me).
On Precise i get 1024 x 768 (6:9) 60hz. Which means that I have an ugly
2inch gap down the left of the screen, and the bottom couple of inches
below the edge of the physical screen. (I hope this makes sense)
This confusing problem led me on a google-thon and I have got this far.
The Output from xandr in terminal with TV connected:
pete@petes-lappy:~$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
LVDS1 connected (normal left inverted right x axis y axis)
1280x800 60.0 +
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm
x 0mm
1024x768 60.0*
800x600 60.3 56.2
848x480 60.0
640x480 59.9
TV1 disconnected (normal left inverted right x axis y axis)
As you can see 1360 x 768 (or anything close is *not* an option) so I am
left trying to devise a way of getting it!
i have run gtf in terminal and get the following:
pete@petes-lappy:~$ gtf 1360 768 60
# 1360x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 84.72 MHz
Modeline "1360x768_60.00" 84.72 1360 1424 1568 1776 768 769 772 795
-HSync +Vsync
Which gave me the idea of constructing a script to create the modeline
(which if necessary I can run every time I plug the TV in)
The script I devised:
#This line adds modeline from output of gtf command
# 1368x768 @ 60.00 Hz (GTF) hsync: 47.70 kHz; pclk: 85.86 MHz
xrandr --VGA1 "1368x768_60.00" 85.86 1368 1440 1584 1800 768 769 772
795 -HSync +Vsync
#This line adds the mode as it is not default
xrandr --addmode VGA1 1368x768_60
#This line sets resolution on VGA1
xrandr --output VGA1 --mode 1368x768_60
Hi,
Thanks to Tyler for pointing me in the right direction, SOLVED it
Thanks again
(and sorry for replying to you direct Tyler, my messages dont always
reach ubuntu users for some reason)
Thanks Again
Pete
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