Various issues with Intel Drivers for KWin in Kubuntu 12.10

[Martin Gräßlin]

On Wednesday 17 October 2012 12:24:38 Scott Kitterman wrote:
> On Wednesday, October 17, 2012 05:59:23 PM Martin Gräßlin wrote:
> > Hi Kubuntu-Developers,
> > 
> > please note: I'm not subscribed, please CC me in replies
> > 
> > I just wanted to inform you (in case you are not yet aware of it) that we
> > in KWin started to receive a bunch of bug reports for Kubuntu 12.10 in
> > the combination with the Intel drivers since this weekend.
> > 
> > The issues are:
> > * crashes (e.g. Bug #308369)
> > * performance problems (e.g. Bug #308385)
> > * rendering issues (e.g. Bug #308439)
> > 
> > So far we do not have enough data to say whether there is a real and
> > general issue, but I'm concerned enough to send this mail.
> > 
> > What we know is that the issues are related to Mesa 9.0 which got released
> > just last week. Several users told us that downgrading to Mesa 8 the
> > problems go away (of course not an option for Kubuntu users).
> > 
> > My recommendation would be to put a word of warning into the release note.
> > I find the situation very difficult as I neither want you to warn about a
> > problem that does not exist, on the other hand I don't want users to run
> > into the issue and then blaming KDE for bad performance.
> > 
> > Also for the next cycle I would recommend to try to increase the timespan
> > between Mesa driver releases and the release of Ubuntu. I don't think it's
> > a good idea to ship a new Mesa version before the rolling release
> > distributions have played guinea pig ;-)
> 
> I'm all for not breaking things.  One point of clarification though ...
> 
> Quantal has had git snapshots of mesa 9 since August, so it's not like they
> suddenly jumped all the way from 8 to 9 at the last second.
right, but still it is:
a) unlikely that those got tested by a large user base
b) possible that the regression got introduced lately
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