Color ghosting on BeagleBoard xM rev C

Color ghosting on BeagleBoard xM rev C

[Jeff Mitchell]

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Darren Hart suggested I send this to the list...

Attached is a picture of my screen running Terminal. This is on a 
BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and 
then into a Dell UltraSharp monitor. Angstrom doesn't display these 
problems, so the setup should be fine.

I'm not quite sure what is causing this. The resolution is also fairly 
low, and I haven't had any success using boot parameters (either the 
older video=omapfb:mode variant or the newer DSS2 omapfb.mode variant).

Thanks,
Jeff

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Re: Color ghosting on BeagleBoard xM rev C

[Darren Hart]

Jason, Koen,

Does anything spring to mind as an obvious fix for this? Perhaps some
kernel parameter initialization string for the graphics hardware?

--
Darren

On 07/15/2011 08:30 AM, Jeff Mitchell wrote:
> Darren Hart suggested I send this to the list...
> 
> Attached is a picture of my screen running Terminal. This is on a 
> BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and 
> then into a Dell UltraSharp monitor. Angstrom doesn't display these 
> problems, so the setup should be fine.
> 
> I'm not quite sure what is causing this. The resolution is also fairly 
> low, and I haven't had any success using boot parameters (either the 
> older video=omapfb:mode variant or the newer DSS2 omapfb.mode variant).
> 
> Thanks,
> Jeff
> 
> 
> 
> _______________________________________________
> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Linux Kernel

Re: Color ghosting on BeagleBoard xM rev C

[Koen Kooi]

Op 15 jul 2011, om 20:33 heeft Darren Hart het volgende geschreven:

> Jason, Koen,
> 
> Does anything spring to mind as an obvious fix for this? Perhaps some
> kernel parameter initialization string for the graphics hardware?

I've never seen it in angstrom, so you'd have to see what meta-yocto is doing different. In other news, for beagleboard please use the meta-ti layer for that, it's the offcial upstream for beagle and is known to work.

> 
> --
> Darren
> 
> On 07/15/2011 08:30 AM, Jeff Mitchell wrote:
>> Darren Hart suggested I send this to the list...
>> 
>> Attached is a picture of my screen running Terminal. This is on a 
>> BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and 
>> then into a Dell UltraSharp monitor. Angstrom doesn't display these 
>> problems, so the setup should be fine.
>> 
>> I'm not quite sure what is causing this. The resolution is also fairly 
>> low, and I haven't had any success using boot parameters (either the 
>> older video=omapfb:mode variant or the newer DSS2 omapfb.mode variant).
>> 
>> Thanks,
>> Jeff
>> 
>> 
>> 
>> _______________________________________________
>> yocto mailing list
>> yocto@yoctoproject.org
>> https://lists.yoctoproject.org/listinfo/yocto
> 
> -- 
> Darren Hart
> Intel Open Source Technology Center
> Yocto Project - Linux Kernel

Re: Color ghosting on BeagleBoard xM rev C

[Jeff Mitchell]

On 07/15/2011 03:12 PM, Koen Kooi wrote:
>
> Op 15 jul 2011, om 20:33 heeft Darren Hart het volgende geschreven:
>
>> Jason, Koen,
>>
>> Does anything spring to mind as an obvious fix for this? Perhaps
>> some kernel parameter initialization string for the graphics
>> hardware?
>
> I've never seen it in angstrom, so you'd have to see what meta-yocto
> is doing different. In other news, for beagleboard please use the
> meta-ti layer for that, it's the offcial upstream for beagle and is
> known to work.

I'm not using meta-ti because I'm working with Darren to test out 
support for the rev C board in meta-yocto. We just don't know what 
difference is causing this  :-)

--Jeff

Re: Color ghosting on BeagleBoard xM rev C

[Gary Thomas]

On 2011-07-15 09:30, Jeff Mitchell wrote:
> Darren Hart suggested I send this to the list...
>
> Attached is a picture of my screen running Terminal. This is on a BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and then into a Dell UltraSharp monitor. Angstrom
> doesn't display these problems, so the setup should be fine.
>
> I'm not quite sure what is causing this. The resolution is also fairly low, and I haven't had any success using boot parameters (either the older video=omapfb:mode variant or the
> newer DSS2 omapfb.mode variant).

Did you ever find out what is causing this?

When you say that it works on one system (Poky?) vs another (Angstrom?)
are they both running the same version of U-Boot?  I'm seeing this same
behaviour on one of my boards, but only when I run U-Boot from 2011.06

BTW - why did you send your original query to the Poky list?

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: Color ghosting on BeagleBoard xM rev C

[Jeff Mitchell]

On 07/26/2011 12:47 PM, Gary Thomas wrote:
> On 2011-07-15 09:30, Jeff Mitchell wrote:
>> Darren Hart suggested I send this to the list...
>>
>> Attached is a picture of my screen running Terminal. This is on a BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and then into a Dell UltraSharp monitor. Angstrom
>> doesn't display these problems, so the setup should be fine.
>>
>> I'm not quite sure what is causing this. The resolution is also fairly low, and I haven't had any success using boot parameters (either the older video=omapfb:mode variant or the
>> newer DSS2 omapfb.mode variant).
>
> Did you ever find out what is causing this?

No, but I'll be testing out a new build soon -- haven't been able to for 
a bit.

> When you say that it works on one system (Poky?) vs another (Angstrom?)
> are they both running the same version of U-Boot?  I'm seeing this same
> behaviour on one of my boards, but only when I run U-Boot from 2011.06

Yes -- Yocto/Poky/Sato vs. Angstrom. I doubt they're running the same 
version of U-Boot, but I don't know the version numbers offhand.

> BTW - why did you send your original query to the Poky list?

Because Darren suggested that I do so, to get various eyes on it  :-)

Thanks,
jeff

Re: Color ghosting on BeagleBoard xM rev C

[Gary Thomas]

On 2011-07-26 11:00, Jeff Mitchell wrote:
> On 07/26/2011 12:47 PM, Gary Thomas wrote:
>> On 2011-07-15 09:30, Jeff Mitchell wrote:
>>> Darren Hart suggested I send this to the list...
>>>
>>> Attached is a picture of my screen running Terminal. This is on a BeagleBoard xM rev C connected via its HDMI out to a DVI adapter and then into a Dell UltraSharp monitor. Angstrom
>>> doesn't display these problems, so the setup should be fine.
>>>
>>> I'm not quite sure what is causing this. The resolution is also fairly low, and I haven't had any success using boot parameters (either the older video=omapfb:mode variant or the
>>> newer DSS2 omapfb.mode variant).
>>
>> Did you ever find out what is causing this?
>
> No, but I'll be testing out a new build soon -- haven't been able to for a bit.
>
>> When you say that it works on one system (Poky?) vs another (Angstrom?)
>> are they both running the same version of U-Boot? I'm seeing this same
>> behaviour on one of my boards, but only when I run U-Boot from 2011.06
>
> Yes -- Yocto/Poky/Sato vs. Angstrom. I doubt they're running the same version of U-Boot, but I don't know the version numbers offhand.

Check the display setup.  In my case, my old U-Boot (which works great)
was using dvimode=1024x768-24@60 and the new U-Boot is using dvimode=1024x768MR-16@60
When I switch back to the old setting, even with the new U-Boot, my display
runs great again.  n.b. this may be kernel revision sensitive as well.

>
>> BTW - why did you send your original query to the Poky list?
>
> Because Darren suggested that I do so, to get various eyes on it :-)

Sounds reasonable - I only asked because your original email didn't
really spell out why it went to the Poky list.

Thanks & good luck

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------