Last year I was with IB and ran TWS on Ubuntu 16.04 on a cheap and crappy Dell Laptop and never had any problems. I liked it well enough, I just like the charts on TradingView better and IB and TradingView cannot see eye to eye on how to implement an interface.
Yeah if you need charts, TWS is not the place to get them. Probably the weakest part of their software by a country mile. Just use a third party app for your charting. Plenty of good ones to choose from and some will integrate with TWS so you can trade off the third party software if you prefer it.