GNOME Bugzilla – Bug 768478
Lagging on some websites
Last modified: 2016-08-21 09:32:16 UTC
These pages recommend not installing xf86-video-intel and falling back to the modesetting driver. https://wiki.archlinux.org/index.php/intel_graphics https://packages.debian.org/sid/x11/xserver-xorg-video-intel https://www.reddit.com/r/archlinux/comments/4cojj9/it_is_probably_time_to_ditch_xf86videointel/ But without it some pages are very laggy although most pages are not and eveything else is fine I think it has to do with WebKitGTK.
I don't anymore think it's WebKitGTK.
Unfortunately we cannot support the modesetting driver due to this issue. The problem has been identified in mesa, but nobody has fixed it yet. It's https://bugs.freedesktop.org/show_bug.cgi?id=85064
Oh, workaround: run with LIBGL_DRI3_DISABLE=1 in your environment, that should avoid the issue.