What APU are you using? A friend of mine can't use Linux due to the lack of good APU support on his laptop.
A8-4500M and A10-5750M.
A-Series is great for Linux. I have limited experience with the other series, however.
One of my laptops was upgraded thanks to
damn cheap chip sales. I'm definitely upgrading the other one, having beheld the performance boost.
It's better in real life gaming than many "on-pair" competitors, considering only on-chip graphics capabilities, despite some "tech" websites comparisons.
AMD A10 APU against Intel i5 on HP Probook 600 series
Plus, it does great in general tasks as expected.
Sorry for spamming, but it may solve your friend's Linux issue. It can be a
nice upgrade. A paired set of 1600MHz or 1866MHz ram (max for A10-5750M) would be nice either. APUs benefit a lot from high frequency dual channel.
I've had great linux support for my APU laptops so far. They work & perform well on popular distributions. It was a little tricky with arch in the beginning, but catalyst evolved considerably.
Although some non-a-series seem not to work well for laptops on linux, most desktop APUs are linux-friendly, I usb-booted some machines in stores.
PS4 and XBOX1 are using APUs with clever, dynamic RAM management (8GB DDR5 for both graphic and central processing). I guess the next generation of APUs will kick ass, but AMD will delay their release for console sake.
I thought it was already Vi0L0 since he commented on the catalyst-total package and uses it himself... I have a ATI Radeon HD 5850 which should be supported (problems detected with series 2x 3x 4x)
Do you have an APU and an offboard GPU? From your specs, let's assume you have a CPU and an offboard GPU, more likely.
Regardless, it's a Manjaro issue mainly, as Ryan said. If Catalyst were working before, it should keep working, you'll just have to reconfigure properly. If it's not working for you yet, roll back to latest working config.
Of course Arch itself (or based others) can also have issues depending on what's installed. But my Catalyst updates have been seamless lately... And I am running a - sometimes arch-tricky - APU (cpu and gpu in a single chip).