Xpra: Ticket #2459: xpra-shadow OpenGL error spamming

$ xpra version
xpra for python 2.7 is not installed
 retrying with python3
$ lsb_release -rd
Description:	Ubuntu 16.04.6 LTS
Release:	16.04


Windows 10
Xpra GTK2 client version 3.01-r24232 64-bit

Spamming of some OpenGL errors. Supposedly happened from the "spinners" condition. Performance has significantly dropped after this error started to occur.

Intel adapter is used, YMMV

Mon, 21 Oct 2019 20:21:56 GMT - stdedos: attachment set

Tue, 22 Oct 2019 03:29:30 GMT - Antoine Martin: status changed; resolution set

Was already fixed in r23971 (and I forgot to backport to v3), this is almost an exact duplicate of #2425. As of r24234, we will also trap glClear errors in the do_show_pointer_overlay call used by shadow servers.

Sat, 23 Jan 2021 05:51:50 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2459