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An Ubuntu 18.04 Image with the 5.4.24 Linux Kernel and the 2020.07 U-Boot for Trizeps7 is available here: tr7-5_4_24-pconxs-edt7-debian-lxde-18.04-2021-07-12.imz
Use the 'restore' function of the usb_image_tool.zip to copy it to an sd card.
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An Ubuntu 18.04 Image with the 5.4.24 Linux Kernel and the 2020.07 U-Boot for Trizeps7 is available here: tr7-5_4_24-pconxs-edt7-debian-lxde-18.04-2021-07-12.imz
Use the 'restore' function of the usb_image_tool.zip to copy it to an sd card.