[Bug 850628]

[Thomas-luebking]

(In reply to comment #195)
> Please revert this.
> Add a warning, don't enable it by default

It *is* disabled by default - what does not prevent people from happily
activating it, because some guy in a random forum told them "it's the
best trick ever" - and then report crashes in driver that resolve by
"after disabling unredirection, bug is gone"

We basically (and actually for far too long) expose users to a feature,
while knowing it will crash their WM more or less for sure.

> It worked for me very well (Intel HD 3000).
Since you mentioned DRI_PRIME, it will rather be some IGP-GPU briged system?

> Also, without it I can't currently use DRI_PRIME.
As far as i was told, DRI_PRIME does only work *with* redirection, ie. whenever you disable the compositor, the DRI_PRIME context paints nothing.
If it does NOT work redirected for you, the better solution to suspend compositing altogether is not affected.
Either (depending on redirection states) would probably a major bug in the prime handling, though.

> Also, I prepared a patch that makes it less agressive
The level of "aggression" is not relevant, esp. since you try to constrain it to the most problematic cases (override_redirect windows, assuming those are games, ie. likely will have a second GL context) - which overmore would largely benefit from simply turning the compositor off instead (frees memory, quits redirection/damage processing/conversion overhead)

What currently missing to do this from scripts is to have scripts
informed when unmanaged windows are added, eventually resized to/from
"fullscreen".

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https://bugs.launchpad.net/bugs/850628

Title:
  When the Euphoria (GL) Screensaver starts, KWIN crashes

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