SD card not working :[ 249.480884] mmc0: error -5 whilst initialising SD card
There is a kernel compatibility issue with some sd cards (mainly SDHC or SDXC).
A workaround is below, but the IO speed is about 10x lower :(
Write a file called /etc/modprobe.d/sdcard.conf with this content:
options sdhci debug_quirks2=0x2
Let's remove and probe some modules:
sudo rmmod sdhci_acpi sdhci_pci sdhci
sudo modprobe sdhci; sudo modprobe sdhci_acpi; sudo modprobe sdhci_pci
After this, your SD card must be shown at notification bar.
To save all this configurations, run:
sudo update-initramfs -u