Xpra: Ticket #2204: better opengl support detection

Based on #2203 and #1994, we should:

do a test using transparency
trap any exceptions thrown and fail the driver

Wed, 20 Mar 2019 16:07:59 GMT - Antoine Martin: status changed; resolution set

status changed from new to closed
resolution set to fixed

Done in: r22160, r22161, r22162, r22163, r22164, r22165 + r22166.

(some will be backported)

Follow up in #2230.

Thu, 21 Mar 2019 14:11:34 GMT - Antoine Martin:

Updates:

r22197 silence some GTK warnings
r22198 skip re-doing the full window rendering test when we already have a 'probe-success' response

Sat, 23 Jan 2021 05:44:58 GMT - migration script:

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2204