https://kait2en.org/blog.htmlRelease notes, upstreaming reports and T2 debugging write-ups.enhttps://kait2en.org/blog/thunderbolterella.htmlhttps://kait2en.org/blog/thunderbolterella.htmlSat, 15 Aug 2026 12:00:00 +0000The hunt for deep package C-states on the 15,1 MacBook Pro gets uglyhttps://kait2en.org/blog/enfant-terrible.htmlhttps://kait2en.org/blog/enfant-terrible.htmlFri, 14 Aug 2026 12:00:00 +0000Fedora rebuilt the initramfs, four T2 modules quietly disappeared and an encrypted MacBook was left with a passphrase prompt it could not type into.https://kait2en.org/blog/hybrid-graphics-upstream.htmlhttps://kait2en.org/blog/hybrid-graphics-upstream.htmlWed, 12 Aug 2026 12:00:00 +0000The discrete GPU can finally sleep while Intel drives the display, saving roughly 12 watts without giving up PRIME offload or external monitors.https://kait2en.org/blog/where-did-the-watts-go.htmlhttps://kait2en.org/blog/where-did-the-watts-go.htmlTue, 11 Aug 2026 12:00:00 +0000Package C-states, PROCHOT and a forest of PCI devices turned power debugging into two new tools instead of another collection of shell commands.https://kait2en.org/blog/more-than-a-fan-controller.htmlhttps://kait2en.org/blog/more-than-a-fan-controller.htmlMon, 10 Aug 2026 12:00:00 +0000The T2 SMC gave Linux a working clock, charge limiting, standard fan control and enough sensors to finally ask where the heat and power are coming from.https://kait2en.org/blog/the-navi-rabbit-hole.htmlhttps://kait2en.org/blog/the-navi-rabbit-hole.htmlThu, 06 Aug 2026 12:00:00 +0000Hybrid graphics on the 16-inch MacBook Pros can turn the dGPU off. Bringing it back reliably is where the hardware starts telling a much stranger story.https://kait2en.org/blog/three-watts-and-a-dead-usb-port.htmlhttps://kait2en.org/blog/three-watts-and-a-dead-usb-port.htmlSun, 02 Aug 2026 12:00:00 +0000Runtime-suspending Thunderbolt saved real power on the MacBookPro15,1, until USB 3 hotplug stopped working and the apparently obvious patch fell apart.https://kait2en.org/blog/the-small-things-you-touch-every-day.htmlhttps://kait2en.org/blog/the-small-things-you-touch-every-day.htmlWed, 29 Jul 2026 12:00:00 +0000Keyboard light, display brightness and the Fn key are small features until they reset after every reboot or disappear after every suspend.https://kait2en.org/blog/making-the-speakers-sound-like-speakers.htmlhttps://kait2en.org/blog/making-the-speakers-sound-like-speakers.htmlMon, 27 Jul 2026 12:00:00 +0000Getting sound out of the speakers was only the first half. Making it usable without crackling, wrong routing or damaged speakers became its own project.https://kait2en.org/blog/the-resume-that-took-a-minute.htmlhttps://kait2en.org/blog/the-resume-that-took-a-minute.htmlFri, 24 Jul 2026 12:00:00 +0000Suspend worked, but every CPU took several seconds to return. The fix was not making CPU startup faster. It was waiting for the right moment.https://kait2en.org/blog/kait2en-is-through-the-door.htmlhttps://kait2en.org/blog/kait2en-is-through-the-door.htmlTue, 14 Jul 2026 12:00:00 +0000This is a copy of the text I wrote on Reddit when I released KaiT2EN in July 2026