siliconmotion VGA output

[public]

By default external VGA port has 800x600 resolution, but internal panel has 1024x600. In external monitor image compressed horizontally, bug in driver?

[Daniel Clark]

On Fri, Aug 17, 2012 at 3:58 AM, public <pub...@omega.hopto.org> wrote:

By default external VGA port has 800x600 resolution, but internal panel has 1024x600. In external monitor image compressed horizontally, bug in driver?

 

Are you having difficulty getting 1024x768 on the external VGA port of the Yeeloong?

 

I've done that before, I thought it was default but I may have had to use xrandr or something. 

[Kip]

Are you having difficulty getting 1024x768 on the external VGA port of the Yeeloong?

 

I've done that before, I thought it was default but I may have had to use xrandr or something. 

Hey Daniel. How does one enable 1024x768 on the external VGA port?

Kip

[public]

Image compressed horizontally, half of the letters are not visible, maybe it's a hardware bug.
http://ompldr.org/vZjVoNg/siliconmotion.jpg

[Daniel Clark]

yeeloong with gnewsnese uses framebuffer driver. If you tell linux that
you have a 1024x768, it'll output that to the external monitor, but the
internal monitor will have a funky display.

> >> Passing "vga=0x317" to the linux boot command line makes fbset and
> >> xrandr report 1024x768, and seems to actually be sending 1024x768 to
> >> an external monitor, but on the external monitor the bottom 1024x168
> >> pixels are black.

Look at loongson-dev archives for more info. There are also some patches that might make it work with accelerated X driver.

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[Kip]

On Saturday, August 18, 2012 1:25:56 PM UTC-7, Daniel Clark wrote:

yeeloong with gnewsnese uses framebuffer driver. If you tell linux that
you have a 1024x768, it'll output that to the external monitor, but the
internal monitor will have a funky display.

Hey Daniel. What do you mean the internal display will be funky? Isn't the internal monitor's native resolution 1024x768 anyways? If not, is there no way to the external VGA port to be 1024x768 and the internal LCD to remain at whatever is its native resolution?

Kip

[Matt Turner]

You've only got 4 MB of VRAM, so I don't think both internal and
external video can be active at once.

[Kip]

On Sunday, August 19, 2012 5:24:36 PM UTC-7, Matt Turner wrote:

You've only got 4 MB of VRAM, so I don't think both internal and
external video can be active at once.

You can definitely use both at the same time, as I do all the time. Having said that, the VGA chipset is very weak, even for non-multimedia related applications, and it is the only tragic thing about the Yeeloong.  Other than that, it's a great gadget.

Kip