I have Linux on my TI-Nspire CX (Non CAS), and it freezes at boot. Any way to get it to boot?

Which files did you use (kernel, initrd, bootscript, linuxloader) and when does it freeze?

Did you download the DTB?

You got the files from here, did you?
Just download the appropriate dtb for your calc and load it with "dtb <filename>" in your bootscript before "boot"

I installed linux on my TI-Nspire CX CAS and it all works fine, except for the USB, I used the files here: http://tiplanet.org/nspire-linux-builds/ and I have a powered usb hub connected to my calc, and TI OS gives me the error message about an error with the connected device. lsusb shows nothing, and dmesg doesn't show anything useful. Any help?

I installed linux on my TI-Nspire CX CAS and it all works fine, except for the USB, I used the files here: http://tiplanet.org/nspire-linux-builds/ and I have a powered usb hub connected to my calc, and TI OS gives me the error message about an error with the connected device. lsusb shows nothing, and dmesg doesn't show anything useful. Any help?

USB isn't really working in the DTB builds. It should work if you use the "Older kernel" without DTB.

I just noticed on the wiki: It says "unknown" for the 84+ Link Port. I'm not saying I disagree with the following "do we need this" but I do want to point out that it just hooks into a few I/O pins on the CPU. It should be relatively easy to add support for it.

The GPIO driver is also just setting and clearing some bits, but still >200 lines. Also, which subsystem should it use?

I wonder if it's possible to have a small, light-weight GUI application with this, like a small menu based file browser. That'd up the functtionality by a lot.

Sweet, thanks! Any idea when USB will be supported in the newer builds?

Probably never, I don't know why it doesn't work if I simply tell the DTB the EHCI address and IRQ. Maybe some initialization differences.

Also, what is the difference between the defconfig and expanded builds for the old kernel?

It's simple: The defconfig has only those options activated which are required for booting. Just use the expanded kernel if you want to use it, it has most required drivers included.

I wonder if it's possible to have a small, light-weight GUI application with this, like a small menu based file browser. That'd up the functionality by a lot.

Depends which files you want to browse. I reverse-engineerd the highest level of the filesystem (reliance) and have a basic fuse driver ready, but the lower level (flashfx) isn't implemented yet.

Plug your OTG cable in the calculator while on TIOS without the USB drive, plug that in once the kernel says it's waiting for the rootfs.