Hello guys! I am using Gentoo Linux and I'm struggling with my card reader because it does not work. Device is: 02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) I've tried many things with sdhci kernel driver but without success. Recently I've booted Ubuntu 19.04 LiveCD and card reader worked out of the box. Did you patch sdhci driver manually or it's another kind of sorcery making this device running fine in Ubuntu?