svn commit: r564088 - in head/x11: linux-nvidia-libs nvidia-driver nvidia-driver/files nvidia-settings nvidia-xconfig

[Craig Leres]

On 2/8/21 11:22 AM, Craig Leres wrote:
> However, ever since booting with nvidia-driver-460.39 I've been seeing 
> intermittent xterm glitches related to running firefox and kicad. It 
> looks like some kind of hardware buffer swapping... Like something is 
> switching between slightly different versions of a window, sometimes 
> once every 5 seconds and sometimes very fast. And sometimes xterm 
> scrolling results in the line doubling that doesn't really exist.
I see now this is a known problem with 460.39:

     https://www.nvidia.com/Download/driverResults.aspx/170134/en-us

     Vulkan with flipping enabled on Quadro cards can lead to graphic
     corruption. If you think you have run into it you can do either
     of the following as a workaround:

     - Disable flipping in nvidia-settings (uncheck "Allow Flipping"
       in the "OpenGL Settings" panel)

     - Disable UBB (run 'nvidia-xconfig --no-ubb')

     - Use a composited desktop

This is the "additional information" for the linux x64 flavor that is 
missing from the FreeBSD flavor. And looking around Vulkan might not be 
supported for FreeBSD but the bug appears to be present.

For FreeBSD I see that nvidia-settings can disable flipping but it's 
rare enough that I can usually close the window that causes the glitches.

For reference all of my FreeBSD desktops use the Quadro 410.

		Craig