1 1
xloem

mmaping framebuffer on focal, teres

Recommended Posts

I'm not familiar with the a64 graphics driver and some tty graphics software of mine is failing on Armbian Ubuntu Focal after working fine on the Bionic image.

 

Earlier I was able to mmap() /dev/fb0 to display graphics in a tty.  On Focal 20.04, running linux 5.4.43-sunxi64 , mmap() on /dev/fb0 is failing with EPERM (operation not permitted).

 

Is this new error something anybody knows about or could give a link to find a possible driver change that's responsible?  It seems there might be a few different video drivers on this system and I haven't looked at them before.

 

/sys/class/graphics/fb0/name contains sun4i-drmdrmfb

/sys/class/graphics/fb0/device/modalias contains of:Ndisplay-engineT(null)Callwinner,sun50i-a64-display-engine

 

Thank you.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
1 1