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[Solved] Instructions on updating TinyCore 11 to Real Time?

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pditty:
I hope everyone is staying safe during the COVID-19 Pandemic.

I need to create a bootable iso image and wanted to ask if anyone had updated instructions for making TinyCore 11+ Real-Time or can help me figure out what I'm doing wrong.  I feel like I've looked at everything on the web regarding this topic but I still can't get it to boot into the gui.

I've looked at the RTAI link from 2016 http://j.bamiere.free.fr/RTAI/ModOp.htm#mozTocId601179.

Creating a custom tinycore kernel http://wiki.tinycorelinux.net/doku.php?id=wiki:custom_kernel

Remastering example https://github.com/elazarl/customize_tinycorelinux/blob/master/README.md

Another example here https://github.com/on-prem/tinycore-kernel/blob/master/Makefile

Creating Purpose TinyCore Images https://fabianstumpf.de/articles/tinycore_images.htm

Extract and Repack scripts https://github.com/elazarl/customize_tinycorelinux

Here is what I've been doing so far....

#1. Download the pre-patched 5.4.3 kernel from tinycore src/kernel directory
#2. Extract the kernel and then patch with the 5.4.3 rt patch using these instructions https://wiki.linuxfoundation.org/realtime/documentation/howto/applications/preemptrt_setup
#3. Copy config-5.4.3-tinycore from the src/kernel directory to the extracted Linux-5.4.3 directory and rename to .config
#4. Run make oldconfig (selected #4 for Preempt and all other options were defaults)
#5. Run make bzImage
#6. Run make modules
#7. From tinycore distribution_files I downloaded the rootfs.gz file
#8. Extracted rootfs using 'zcat /tmp/rootfs.gz | sudo cpio -i -H newc -d'
#9. Ran make INSTALL_MOD_PATH=/<extracted rootfs>/lib/modules modules_install firmware_install
#10. Went into that <extracted rootfs>/lib/modules directory and created kernel.tclocal symlink to point to /usr/local/lib/modules/5.4.3-tinycore/kernel/
#11. Ran this command from <extracted rootfs>/lib/modules/<kernel name> "find . -name "*.ko" -exec gzip -9 '{}' \;"  to find and compress all the .ko files to .ko.gz
#12. Opened modules.dep, modules.builtin, and modules.order in a text editor and globally replaced all the .ko with .ko.gz extensions so they were referenced correctly.
#13. Compressed this rootfs by running "sudo sh -c "find . | cpio -o -H newc | gzip -2" > core.gz" at the root level
#14. Copied core.gz to the iso boot directory that was created when I ran tinycore-extract.sh found at https://github.com/elazarl/customize_tinycorelinux
#15. Copied bzImage from compiled Linux image in step #5 to the boot directory created from tinycore-extract.sh and renamed it vmlinuz
#16. Ran a modified script to build the iso.

#!/bin/bash
OUTPUTISO="tinycoreRT-04032020.iso"
ROOTFS="/home/me/TinyCore/test_04012020/initrd/core"
VOLUMEID="tinycoreRT-04032020"
BOOTARGS=""

TMPDIR="/home/me/TinyCore/test_04012020/iso"
chmod 755 "${TMPDIR}"


# alter isolinux config to use our changes
ISOLINUX_CFG="${TMPDIR}/boot/isolinux/isolinux.cfg"
sed -i 's/prompt 1/prompt 0/' "${ISOLINUX_CFG}"
sed -i "s/append/append cde ${BOOTARGS}/" "${ISOLINUX_CFG}"

# build a new iso
xorriso -as mkisofs -iso-level 3 -full-iso9660-filenames -volid "${VOLUMEID}" \
        -eltorito-boot boot/isolinux/isolinux.bin -boot-load-size 4 \
        -eltorito-catalog boot/isolinux/boot.cat -boot-info-table \
        -no-emul-boot -output "${OUTPUTISO}" "${TMPDIR}/"

Juanito:
So you can boot to a console prompt?

pditty:
Yes, I can.

Juanito:
If you start Xvesa/Xfbdev/Xorg-7.7 as per the first line of .xsession do you get an error message?

pditty:
It flashes so fast but this is what it says...

Booting Core 11.1
Running Linux Kernel 5.4.3-rt1-tinycore
Checking boot options... Done.
Starting udev daemon for hotplug support ... Done.
Scanning hard disk partitions to create /etc/fstab
Setting Language to C Done.
Possible swap partition(s) enabled.
Loading extensions...|

And then it kicks me to the command prompt.
tc@box:~$

Does that help at all?

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