Snow-like noise in dark areas of video
#1
Sad 
I'm using the latest 16.04 image (xubuntu-xenial-20160501-longsleep-pine64), and seeing some annoying noise in dark areas of the screen. Mostly (near-)black ones, but some dark blue ones.

The noise is small numbers of individual pixels flickering between the expected color and a light one (maybe the 1's or 2's complement?? It looks a little yellowish when it's on blue). I don't see it on a normal desktop display, except in the terminal emulator window while the "logout" popup is displayed.

It's not always present in blue areas of the screensavers, but does show up sometimes.

It's always there during video playbacks, with videos recorded using the XviD, DivX 5, and MPEG codecs (all the types I've tried). It also shows up in MJPEG streams from an Axis camera. So it doesn't seem likely to be a codec bug.

It looks like it's probably either a hardware or a video driver bug. Any suggestions on how to isolate it?

Thanks,

Ran
  Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)