On Wed, 18 Mar 2020 at 18:42, George Avrunin <avru...@math.umass.edu> wrote:

> Like many universities, we are converting to working from home and
> doing only online instruction as of Monday.  (This week is spring break and
> faculty get to use it to figure out how to make the online instruction
> work.)  The campus has a Zoom license and we are urged to use that for
> class sessions.  I've run into a problem and tried the fix suggested by
> Zoom support, but it's not working and I'm hoping someone here can help me.
> Trying to interact with Zoom support gets a "we're too busy right now"
> message....
> The problem is sharing a window/screen (desktop).  I can share from my
> Fedora desktop, but when I stop the sharing Zoom crashes (or, in some
> configurations--see below--sharing a window/screen just blacks out the
> window/screen being shared).   Zoom support indicates that this is mostly a
> problem with something automatically switching from the nvidia card to a
> built-in card and suggests running
>    xcompmgr -c -l0 -t0 -r0 -o.00
> With the nvidia driver, this seems to have little or no effect.   It does
> seem to work with nouveau, but I'm getting an annoying flashing of (at
> least some windows on) the screen with nouveau (and I'm losing some
> performance that I'd like to keep for other purposes).

You don't mention if Wayland is involved.

> Here are the details:
> [...]
> I also have a Dell XPS 13 laptop running Fedora 31, also running KDE.  It
> doesn't have this problem (but I hope not to have to use it for online
> teaching; the screen is too small and it's one of the ones with the webcam
> at the bottom of the screen, so if you can reach the keyboard to type, the
> camera is looking up your nose).
> Thanks for any suggestions you can give me.
>   George

Can you use an external monitor, mouse, and keyboard with the laptop (and
laptop for best camera placement)?

George N. White III
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