broken sd card reader?

[kratti]

Is the SD card mounted with write permission + what is the exact text of the error message?

Are you aware that SD cards can be non-genuine and need validation with a test using a tool like the f3 tools? The f3 tool writes files to the card to verify the capacity of the card. It's better to know as best you can find out up front that an SD card is good before trying to use it, or rely on it as it may already be a dud.

The exact text of the error message depends on the program I try to write on the card(s) with. "/dev/mmcblk1: fsync device failed: I/O-error", "error writing xyz bytes to offset 0: I/O-error (g-io-error-quark, 0)" and "timed out waiting for object (udisks-error-quark, 0).

I can use the cards with other devices, like a navigator, and one of the cards (SanDisk Ultra 64gb A1) used to work on my pinebook pro before I installed Manjaro on it. Other cards are Kingston 32gb HC cards, that I didn't try on the pinebook pro before switching to Manjaro.

To me those I/O errors seem to be saying that all the cards are broken? Which is clearly not true since they do work, just not on the pinebook pro. My deduction therefore is that the card reader must be faulty, or that there's something wrong with my Manjaro installation. I must confess I'm not familiar with sd card readers or cards since I haven't had to use them for close to a decade and never with a computer, so there's probably something that I'm overlooking.

Any help would be greatly appreciated.