xv breaks after suspend/resume cycle

[Zack]

This was found on a B4 running 515.

If I press the power button to suspend my XO while live video is being shown by Record, the XO does in fact suspend, but when I resume it via the same method, the live video is gone and replaced by a solid rectangle.

[cjb]

This could be one of (at least) four things:

• Xv bug in X; can test if that's the case by running "xvtest" across resume
• v4l2 closes the device at suspend time, or something, and we need to reopen it?
• kernel driver isn't doing resume reinitialization properly? (though it works if you close and restart camera-activity)
• camera-activity does something wrong.

[coderanger]

Adding reporter to CC list

[coderanger]

Adding reporter to CC list

[erikb]

Ran xvtext (on a b4, build 542 "trial2") and returned from resume with a blankscreen... looks like an xv bug.

[JordanCrouse]

Wow - thats never good. We're probably not saving the registers.

[JordanCrouse]

Adding patch against olpc-stable 58ade5716b2aaf7db4a74cd543459112c278842d and reassinging to Andres to be included in das kernel.

[jg]

Andres, has this been included?

[jg]

camera survives suspend fine in joyride 1537.