I got my Realtek SD Card Reader working in macOS and it is even shown in System Information! : r/hackintosh
usb - Is there an SD Card diagnostic utility? - Ask Ubuntu
GitHub - tai271828/sd-driver-tutorial: A SD card reader tutorial example from Linux kernel source code.
GitHub - Zibri/Realtek-rts5229-linux-driver: Realtek card reader driver for kernel >4.4.x (ubuntu 16.04-17.10 have broken driver and all kernels up to 4.15.0-041500rc1)
How to Create a Persistent Linux Installation on a Bootable Live USB or SD Card
Why ID card reader is not working in Ubuntu 12.04, 12.10? Using Omnikey3121 - Ask Ubuntu