[Openchrome-users] openchrome - epia SN18000G - resolution problems

[Xavier Bachelot]

Buchner Michael wrote:
> Buchner Michael wrote:
>> Xavier Bachelot wrote:
>>> Buchner Michael wrote:
>>>> Hi there,
>>>>
>>>> I've a problem with the setup mentioned in the topic and I'm running 
>>>> out of ideas ;( Maybe one of you can help me or at least give me 
>>>> some hints what to do ...
>>>>
>>>> Well as you can imagine I'm using openchrome as driver for my 
>>>> graphics card. My Mainboard is the via epia SN18000G vith VIA VT8251 
>>>> South Bridge and CN896 North Bridge. 
>>>> (http://www.via.com.tw/en/products/mainboards/motherboards.jsp?motherboard_id=550) 
>>>>
>>>> I've played a lot to get Xorg running a now it basically is, BUT 
>>>> with some problems. i want to connect my LCD TV Screen to be used as 
>>>> monitor. The TV's user manual says that the resolution is 1366x768 
>>>> with 60Hz.
>>>> within the xorg log file I can see this:
>>>> (**) CHROME(0): *Mode "1280x720": 59.4 MHz (scaled from 0.0 MHz), 
>>>> 37.9 kHz, 50.1
>>>>  Hz
>>>> (II) CHROME(0): Modeline "1280x720"   59.42  1280 1312 1536 1568  
>>>> 720 735 741 75
>>>> 7
>>>>  which is the supported resolution according to edid (?)
>>>>
>>>> If I use the modeline manually (or another one for 1366x720 at 60) the 
>>>> resolution is ok but I get some kind of flickering. If I don't use 
>>>> any modeline the resolution is at 1280x720 according to xvidtune but 
>>>> the picture is not fitting the monitor. it seems to feel that my 
>>>> screen is bigger in either direction as it actually is. but there is 
>>>> no flickering ...
>>>>
>>>> I also should mention that I need to use the
>>>>      Option          "DDC" "false"
>>>> within the Screen Section of xorg.conf. Otherwise I only get 1024x768.
>>>>
>>>> I really can't remember what I've already tried ... way too much ;)
>>>> Does anyone have any idea?
>>>>
>>>> Thanks a lot
>>>>
>>> How is your TV connected to the board ?
>>> Please post your xorg conf and xorg log (compressed). My bet would be 
>>> either you are using Option "VBEModes" either you are using Option 
>>> "ActiveDevice" "LCD".
>>>
>>> Regards,
>>> Xavier
>>>
>> Hi,
>>
>> TV is connected via VGA cable. I've used both settings during my 
>> experiments with xorg, but right now it's not included anymore. It's 
>> now stripped down to a very basic and simple xorg.conf (see attached)
>>
>> thanks
>>

> does anyone have some hints for me? ;)

The conf looks good.
How did you generate your modeline ? I suggest using cvt.
Did you try with a reduced blanking modeline ? ( This needs an 
additional option in the xorg conf, something like "ReduceAllowed", 
serach the mailing lists' archives).
Did you try with 1366x768 ? 1366x768 with reduced blanking ?

Regards,
Xavier