Linus Torvalds wrote in the brief 5.13-rc2 announcement , " Things look pretty normal: rc2 tends to be fairly quiet as people start finding issues, and while 5.13 looks to be a pretty big release over-all, the changes in rc2 are if anything slightly smaller than average. But it's well within the noise. The fixes here are all over the place - drivers, arch updates, documentation, tooling.. Nothing particularly stands out, although a fix for some VGA text-mode font size issues is funny (as in "strange", not "ha-ha funny") just because so few people presumably use the extended SVGA text modes any more. That's not recent breakage either. "
Details on that "strange" VGA text mode font issue fix via this merge , " These have been verified with true VGA hardware (a Trident TVGA8900 ISA video adapter) using various combinations of `svgatextmode' and `setfont' command invocations to change both the VT size and the font size, and also switching between the text console and X11, both by starting/stopping the X server and by switching between VTs. All this to ensure bringing the behaviour of VGA text console back to correct operation as it used to be with Linux 2.6.18. "
One new item worth mentioning in Linux 5.13-rc2 is some AMD SEV code restructuring in preparations for SEV-SNP feature work to come in a future merge window.
See our Linux 5.13 feature overview for the lengthy list of new features and improvements with this kernel version.