Monitor Resolutions Supported

Hi All,

Sorry if this is a very obvious question, but what is the maximum
monitor resolution that Beagle Board can support? I think the HRM says
XGA (1024x768), however I'm sure I've also read somewhere that up to
1280x768 or 1280x1024 works. I would have thought that if 720p
decoding is supported then 1280x768 must be supported, but I wanted to
double check before trying to get hold of a monitor.

Thanks,
Max

I don’t know of any monitors that have failed to work as all of them have fallback modes they can support. 1024x768 is what most everyone is using and it really depends on the application that is being run. If you find the cheapest DVI-D capable monitor, you should be OK. 1024x768 is the value specified by the DVI-D framer specification on the BeagleBoard, but as you say, we have people running it at 1280x1024.

Gerald

Gerald,

Thanks for the advice - ebay, here I come!

Make sure it is DVI-D as DVI can sometimes mean Analog VGA.

Gerald

max wrote:

Hi All,

Sorry if this is a very obvious question, but what is the maximum
monitor resolution that Beagle Board can support? I think the HRM says
XGA (1024x768), however I'm sure I've also read somewhere that up to
1280x768 or 1280x1024 works. I would have thought that if 720p
decoding is supported then 1280x768 must be supported, but I wanted to
double check before trying to get hold of a monitor.

Using git kernel and mru's patch, the resolutions encoded in this patch are currently supported

http://git.mansr.com/?p=linux-omap;a=commitdiff;h=892648ebaf6fdcdd572238194600f6060d987d06

Dirk

Gerald Coley wrote:

I don't know of any monitors that have failed to work as all of them
have fallback modes they can support. 1024x768 is what most everyone is
using and it really depends on the application that is being run. If you
find the cheapest DVI-D capable monitor, you should be OK. 1024x768 is
the value specified by the DVI-D framer specification on the
BeagleBoard, but as you say, we have people running it at 1280x1024.

Can you give some more details regarding 1280x1024? With git kernel I
had no luck with 1280x1024 yet:

http://www.beagleboard.org/irclogs/index.php?date=2008-08-29#T19:42:09

Is this 1280x1024 you report with TI kernel?

My monitor wants 50-75Hz refresh rate. With git kernel we actually
have max pixel clock 72MHz. With this it's really hard to get
1280x1024 @ 50Hz :frowning:

Btw: What's the max pixel clock we can configure? Discussion at IRC
and in community is quite vague about this. Some people report 173/2 =
86.5 MHz.

http://www.beagleboard.org/irclogs/index.php?date=2008-08-28#T20:11:15

But we are not sure about this. Any hint?

Thanks

Dirk

Dirk Behme <dirk.behme@googlemail.com> writes:

max wrote:

Hi All,

Sorry if this is a very obvious question, but what is the maximum
monitor resolution that Beagle Board can support? I think the HRM says
XGA (1024x768), however I'm sure I've also read somewhere that up to
1280x768 or 1280x1024 works. I would have thought that if 720p
decoding is supported then 1280x768 must be supported, but I wanted to
double check before trying to get hold of a monitor.

Using git kernel and mru's patch, the resolutions encoded in this
patch are currently supported

http://git.mansr.com/?p=linux-omap;a=commitdiff;h=892648ebaf6fdcdd572238194600f6060d987d06

Not all of those resolutions actually work as advertised, since the
pixel clock is currently limited to 72MHz. It depends on the monitor
whether it the slightly lower sync rates this results in will work.