Hello

A Boot Loader update is available in the latest batch of Slackware AArch64-current (Wed Jan 03 08:08:09 UTC 2024).

This update tackles the issue of the MMC (SD card) interface becoming inaccessible post a soft reboot, a problem identified during my extensive testing of Linux 6.6.
Upon updating to this version of U-Boot, I've been unable to replicate the issue.
Consequently, I strongly recommend this as a mandatory update to ready your system for Linux 6.6.

The upgrade instructions for both Hardware Models can be found here.

Linux 6.6 is currently undergoing testing here, and once it's demonstrated stability, I intend to roll it out within approximately a week.

It's been a little while I installed my pbp. I was not able to go sd card slot and sd card route, I used left side usb connector with usb card reader and slackware install sd card and so on.

I also installed towboot and still can boot original manjaro from emmc.

With this boot loader update, with the way I monkey installed things, will I get either one to boot or both?

I'm asking as I did my rockpro64 and can see it offered whatever to boot.

Our U-Boot is written to SPI flash, which IIRC is checked first by the first stage boot loader. I have no experience on how it interacts with any other Boot Loader.

Tow-boot bootloader should be installed to your SPI flash too. Within the Slackware installation you can overwrite it with the flashing utility on both the pinebook pro and rockpro64. Manjaro should be bootable from u-boot if you configure u-boot to find it.

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newer slackware u-boot flashed, towboot dumped, manjaro kept booting no slackware, rereading difdif post now booting slackware, no manjaro yet, will look into this all without sd card, nvme boot as before with towboot

now where's that 6.6.... kernel or are we going have to involve Exaga?

relevant /boot/extlinux/extlinux.conf lines

I don't know this stuff, this looks like elilo, is possible to add another os to boot from here, or like mralk3 says has to be with u-boot?

U-Boot uses the extlinux configuration, which is what you're looking at.
Add another stanza below the existing one. Stanzas start from LABEL.
The Archlinux wiki has some good examples - Look at section 4.1.1.

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I've just applied the updated bootloader-flash-rk3399. The computer still boots from the nvme drive without any issues - thank you for the update!

David.

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