xserver-xorg-video-intel slow perfomance, needs updating

[Leif]

Laggy performance on Chromium/Electron based applications when running maximized windows.

References/more inforation:
https://github.com/Microsoft/vscode/issues/162
https://github.com/atom/atom/issues/9724
https://code.google.com/p/chromium/issues/detail?id=514510#c37

The issue is solved by using updated drivers from this ppa:
https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers

Or by using latest from git here:
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel

Only able to reproduce on 4k resolutions and higher

Hardware specs:
Dell XPS 15-9530
Resolution 3200x1200
Intel HD Graphics 5000
Intel Core i7-4702hq
16 GB ram
SSD drive

Ubuntu 15.10, fully updated per 2015-12-11

[Timo Aaltonen (tjaalton)]

This is likely fixed in xenial then which has a later snapshot. If you want something backported to 15.10 then feel free to bisect but until then this stays closed

[Leif (leifcr)]

@tjaalton Xenial has git 20151019 (2:2.99.917+git20151019-1~exp1ubuntu1). Since there is no information on the git commit, I assume ef859c807a4bfad7c8a01a1d63f354f3ef310db5 from that date.

By building the drivers on commit ef859c807a4bfad7c8a01a1d63f354f3ef310db5 on 15.10.

I checked the daily build on 16.04, and the issue is there as well. However, by using the latest driver on commit c4565979572b61cf7fc0b931333c032c88b259f1, the issue is not visible.

I would like to request the driver in 16.04 to be updated, if possible.

[Timo Aaltonen (tjaalton)]

thanks for the update, will create a newer snapshot for xenial eventually

[Timo Aaltonen (tjaalton)]

a new upstream snapshot got uploaded to xenial today