It seems the original poster has been living under a rock.
1. Catalyst has always been problematic on Linux and will stay that way - I switched away from ATI (partly) because I had to wait for a new release of Catalyst (or two) whenever Ubuntu switched to a new X server. And Ubuntu isn't all that cutting edge even.
2. The open-source driver will never be usable for gaming. Ok, maybe when AMD releases Radeon 12770, your 7770 will work better using the open source driver, because AMD would have dropped support from Catalyst 3 years before.
But if you don't care about a usable card and just want to support OSS, then your choices would be ok.
1. Catalyst has always been problematic on Linux and will stay that way - I switched away from ATI (partly) because I had to wait for a new release of Catalyst (or two) whenever Ubuntu switched to a new X server. And Ubuntu isn't all that cutting edge even.
2. The open-source driver will never be usable for gaming. Ok, maybe when AMD releases Radeon 12770, your 7770 will work better using the open source driver, because AMD would have dropped support from Catalyst 3 years before.
But if you don't care about a usable card and just want to support OSS, then your choices would be ok.
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