[Cbe-oss-dev] Problems getting 1080p in the PS3

[Julio M. Merino Vidal]

On 07/01/2008, at 21:54, Bob Nelson wrote:

> On Saturday 05 January 2008 04:03:41 pm Julio M. Merino Vidal wrote:
>> On 05/01/2008, at 22:17, Geert Uytterhoeven wrote:
>>
>>> On Sat, 5 Jan 2008, Julio M. Merino Vidal wrote:
>>>> On 05/01/2008, at 18:28, Jim Paris wrote:
>>>>> Julio M. Merino Vidal wrote:
>>>>>> I just bought a BenQ FP241WZ flat panel which is capable of
>>>>>> 1920x1200
>>>>>> and has HDCP.  I have hooked it up to my PS3 through the HDMI
>>>>>> connection.  However, when I boot a Linux kernel from the ps3- 
>>>>>> linux
>>>>>> branch, I only get a resolution of 1688x964 that covers the whole
>>>>>> screen (minus the black margins due to the 16:10 vs. 16:9 aspect
>>>>>> ratio difference, which is OK), instead of the 1920x1080 I
>>>>>> should be
>>>>>> getting.
>>>>>>
>>>>>> If I force the kernel to boot into 1920x1080 by specifying
>>>>>> video=ps3fb:mode:170, then the framebuffer image goes off the
>>>>>> screen
>>>>>> in all of the four borders, as if the screen was only capable of
>>>>>> showing 1688x964 pixels...
>>>>>
>>>>> Sounds like overscan.  According to the user manual available at
>>>>>
>>>>>   http://www.benq.ca/support/downloads/downloads.cfm?
>>>>> product=884&page=downloads&dtype=M
>>>>>
>>>>> there is an monitor option in your "picture advanced" menu to turn
>>>>> that off.
>>>>
>>>> Hmm... but why can't the hardware and/or software show the image
>>>> correctly?  I can understand the need for overscan in the past, but
>>>> with flat panels and digital connections?  And also considering  
>>>> that
>>>
>>> Originally 480/576i, 480/576p, 720p, 1080i, and 1080p were analog
>>> broadcast
>>> resolutions including overscan.
>>>
>>> Most (all?) displays I encountered so far have pixels falling off
>>> the borders
>>> of the screen when using fullscreen modes.
>>>
>>>> the laptop is able to show 1920x1200 without issues...
>>>
>>> If 1920x1200 works with your flat panel, I would use that instead
>>> of 1080p.
>>
>> Hmmm, but can ps3-linux use that format?  I thought it couldn't (i.e.
>> it was restricted to 16:9 formats), but otherwise that'd be good  
>> news!
>>
>
> I had almost the exact same thing on my Sharp 42" at 1920x1080  
> connected
> to a PC DVI output with a DVI-HDMI cable. I found a setting on the TV
> setup labeled under "view mode" or something like that called "dot  
> by dot"
> that fixed the overscan.

I also have that option, but it's called 1:1 here.  (In fact, I  
looked around like crazy for a monitor that supported this feature.)   
That does not fix the problem, unfortunately.

Thanks though,

-- 
Julio M. Merino Vidal <jmerino at ac.upc.edu>