Corrupted display on XO1.5 when suspended with screen on

John Watlington wad at
Fri Jun 21 14:56:59 EDT 2013

On Jun 21, 2013, at 2:39 PM, Sebastian Silva wrote:

> Hello OLPC-devels and friends!
> We're preparing an updated Operating System image targeted at the Peru deployment.
> For a while we've been observing a screen corruption when the XO1.5 goes into sleep mode (where the screen remains on, but the computer goes to sleep).

This is likely due to the video controller being disabled before the DCON driver has completely
finished loading the image into the DCON.

> Our image is based on 11.3.1 shipping firmware olpc-firmware-q3c06 (but my testing machine has q3c07 and exhibits the same malfunction).
> I've looked around the issue tracker but couldn't find a similar issue.
> It doensn't always fail but eventually it does, it can take a
> few tries to reproduce.

We did some work to fix the DCON driver in newer releases.


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