[ubuntu-uk] native resolutions

Sun Apr 21 21:56:01 UTC 2013

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 at 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 at 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
>>
>> Returns the following error:
>>
>> pete at petes-lappy:~$ /home/pete/Desktop/tv.bash
>>

<Snip>

Hi,

After more research I have stumbled across this command

sudo lshw -C display; lsb_release -a; uname -a

which gives me the make and model of the Graphics Card (controller).

pete at petes-lappy:~$ sudo lshw -C display; lsb_release -a; uname -a
[sudo] password for pete:
   *-display:0
        description: VGA compatible controller
        product: Mobile GM965/GL960 Integrated Graphics Controller (primary)
        vendor: Intel Corporation
        physical id: 2
        bus info: pci at 0000:00:02.0
        version: 03
        width: 64 bits
        clock: 33MHz
        capabilities: msi pm vga_controller bus_master cap_list rom
        configuration: driver=i915 latency=0
        resources: irq:45 memory:d4000000-d40fffff 
memory:c0000000-cfffffff ioport:5110(size=8)
   *-display:1 UNCLAIMED
        description: Display controller
        product: Mobile GM965/GL960 Integrated Graphics Controller 
(secondary)
        vendor: Intel Corporation
        physical id: 2.1
        bus info: pci at 0000:00:02.1
        version: 03
        width: 64 bits
        clock: 33MHz
        capabilities: pm cap_list
        configuration: latency=0
        resources: memory:d8500000-d85fffff
LSB Version: 
core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.2 LTS
Release:        12.04
Codename:       precise
Linux petes-lappy 3.2.0-41-generic #65-Ubuntu SMP Wed Apr 10 18:23:37 
UTC 2013 i686 i686 i386 GNU/Linux
pete at petes-lappy:~$

I dont know if this throws any light on the problem for anyone else? It 
doesn't help me as I know that Lucid recognized the correct resolution 
and aspect ratio after booting the laptop with the TV connected ONCE and 
it remembered forever! So to my (admittedly ignorant) mind 12.04 
*should* do the same. It cannot be the graphics card or the TV as they 
are the same as I was using on Lucid.

Thanks in advance

Pete