FBIOPUT_VSCREENINFO invalid argument to ioctl on Linux beaglebone 3.8.13-bone70

[kjel...@gmail.com]

Hi guys,

I've got a Beabglebone black unning Linux beaglebone 3.8.13-bone70. I'm trying to implement double buffering using virtual screensize, offsets, panning and vsync syncronization. However, ioctl calls fail because FBIOPUT_VSCREENINFO is not a valid argument. The quick test using fbset: "fbset -vyres 960".

As far as i can tell from others with the same issue, on other platforms, this is due to a limitation in the video driver, which brings me to my question(s):

Has anyone else experienced this and is this a "known" issue? Has this been "fixed" in a later version of the video driver? I also noticed that ioctl returns -1 on FBIO_WAITFORVSYNC.

Thank you in advance!

Best regards,

Martin