I have an Acer TravelMate 7720 with an internal card reader. lspci sees it as:
0f:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)

The card is seen in XP but not by linux, and it is not seen by gparted either. How can I mount this drive?

Does 'dmesg' show that the card has been detected?

Has the 'tifm_7xx1' module been loaded ('lsmod')? If not, does 'sudo modprobe tifm_7xx1' help? (this is the driver module).

dmesg gives the following response:
tifm_core: MMC/SD card detected in socket 0:1
mmc1: error -110 whilst initialising SD card

lsmod says:
tifm_7xx1 4996 0
I am still new to linux. Does this mean it is loaded or not?

The 'sudo modprobe tifm_7xx1' command would not accept my root password,
so I logged in as root with su and tried ' modprobe tifm_7xx1' and it responded with:
WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.

Weird stuff. The only legit incompatibility I can imagine is SD/SDHC, so how big is the card? If that's not it, maybe your reader is broken somehow. I read most of the results for your error message and didn't see much of use.

Yes, if it's in lsmod, it's loaded. The 4996 is the size of the module and 0 means that no other loaded modules are dependent on it (if there were any, they'd be listed - look at the full lsmod for details).

Quick explanation: when you use sudo, you're authenticating as yourself to use the privileges listed in /etc/sudoers. This is different from authenticating as root (as you did when you used su). sudo wants your password. Sounds like the module loaded successfully. Don't worry about that warning; I was seeing it on my F11 until I fixed it recently. Check /etc/modprobe.conf, and if there's nothing there, feel free to delete it. If there is anything, post it here.

The appearance of tifm_7xx1 in the module list means that this module has been inserted, which means that your SD reader hardware was correctly detected and the driver automatically loaded.

However, the mmc1 error you get in the dmesg log is a timeout error, presumably when the driver first reads the settings from the particularly SD card. If you have an older SD card you can try in the reader, it would be interesting to see if that worked. The newer SD cards do have different timings (though that is no excuse for the failure).

Given that it is working under XP, my only suggestion would be to file a Fedora bug report, with the information about your particular hardware and the SD card that is failing.