Hi.
Thanks to kolasa patch we can patch your catalyst 15.9 for support new kernels like 4.2 or 4.3 rc1.
If you want do it:
Download master.zip from kolasa github site: https://github.com/kolasa/fglrx-core-15.201
2 . Download latest catalyst 15.9 and unpack it by command:
./AMD-Catalyst-15.9-Linux-installer-15.201.1151-x86.x86_64.run --extract
3 . Unzip master.zip and paste all files to your new dir (name is some like this fglrx-install.goOxeo) go to /home/x/fglrx-install.goOxeo/common/lib/modules/fglrx/build_mod
and here unpack all files from master.zip, all overwrite.
4 . Go to main folder fglrx-install.XXXX and open terminal/console and run command:
sudo ./ati-installer.sh 15.201 --buildpkg Ubuntu/vivid
(if you want build deb pack for Ubuntu 15.04 Vivid,) (If not run
"sudo ./ati-installer.sh 15.201 --install"
this run classic manuall installer and also should works fine).
5 . After successful generate .deb pack you can install it sudo dpkg -i fglrx*
Done.