Intel Alder Lake Users On Ubuntu 22.04 LTS Will Want To Switch To A Newer Kernel

When it came to some light gaming tests with the ADL-S GT1 graphics, going to Linux 5.16+ tended to help with some minor performance gains...

Or in the case of the open-source shooter game Xonotic, moving from Ubuntu 21.10 to 22.04 actually resulted in a consistent performance hit until upgrading to Linux 5.16+.

Or outside of gaming but sticking to graphics workloads, with the ParaView workstation visualization software there was again a performance regression on the Intel Core i9 12900K going from 21.10 to 22.04 LTS. Fortunately, that regression disappeared when moving to Linux 5.16 and newer kernels.

Or in other ParaView tests, much better performance outright on Linux 5.16+.

But for CPU/system workloads is where the difference of Linux 5.16+ is much more apparent for Alder Lake hybrid processors. Linux 5.16+ delivers much uplift for Core i9 12900K than 5.15 and older, as shown in prior Phoronix articles but rather surprising Ubuntu 22.04's 5.15 kernel hadn't backported more of the work. In some cases on Ubuntu 22.04 LTS with its current 5.15 kernel build there is high variance between the repeated benchmark runs due to the faulty logic with sometimes being tasked to P cores properly and other times stuck on E cores.