p.s. I should have mentioned I have an old-ish Core i3 processor with HD integrated graphics... also, other symptoms that graphics support is insufficient; when starting new windows:
- the box-shadow that GNOME places around the border initially shows black before displaying with the proper shadow & transparency
- windows themselves also often show up black before the window manager maps them properly.
This is on a system that played x.265 compressed videos & had no trouble with Unity / GNOME animations a week ago on Ubuntu 16.04. So I do believe that the driver with Fedora 26 for Intel Integrated Graphics isn't supporting acceleration, at least not for me.
I've just installed Fedora 26 and have problems with highly compressed video (x.264 over a certain bitrate). Currently I'm using whatever driver for Intel Integrated Graphics that would come in the standard Fedora 26 repo. (I don't believe this is a codec problem because low bandwidth video is OK with the same codec.)
I saw there was an Intel® Graphics Update Tool for Linux* OS v2.0.5 but I don't see it available for Fedora 26 at this time, either as a package download or in the repositories: Fedora 26 has been in public release for about a week now. Can someone please tell me:
Any other advice would also be welcome. Video support under these conditions was working well on all previous operating systems up through my last used Ubuntu 16.04, but I don't know how to obtain drivers & settings from Ubuntu that would work in my new environment. I'd be open to advice to wait until proper drivers come out before proceeding with Fedora 26.