On Friday, May 12, 2017 6:39:28 PM CEST you wrote:
> Could you please have a look at the following screencast
> https://www.dropbox.com/s/ox9jfyjca61bfhr/out-trimmed.ogv?dl=0 >
> It shows an emacs client (on the right) which flickers between front and
> back buffer while getting updated. The same happens when another client
> gets damage events.
> I guess it could be a GPU driver bug, but it is a bit strange that it shows
> up both with intel-driver and with the modesetting driver.
> Could be a kernel bug? drm? mesa? any pointer is appreciated!
Apparently using DRI2 in mesa fixes the issue (together with lots of bogus
repaints that I was getting using DRI3), so it is quite possibly a mesa issue.
Exploring with ShowPaint I also noticed that clients were getting lots of
bogus damage with DRI3 which I do not notice with DRI2.
I'll wait some more to make sure it does not resurface and then will file a bug