I can't mount my SD card. I'm using Ubuntu 12.04 LTS on an Asus K55V (Intel), and I have a sd card slot, but Ubuntu doesn't detect when I put a SD card in the slot. Not Ubuntu nor other program.
Run these commands from a command prompt:
sudo modprobe -r r852 sudo modprobe -r sdhci_pci sudo modprobe r852 sudo modprobe sdhci_pci
For Broadcom Corporation BCM57765/57785, in addition to the answer below, I had to add lines to
modprobe.d (before commands above)
$ sudo sh -c 'echo options sdhci debug_quirks=0x40 >> /etc/modprobe.d/sdhci-pci.conf'
$ sudo setpci -s 00:1c.2 0x50.B=0x41