This page is about mounting SD cards after suspend on an Aspire One (8gb SSD) running Ubuntu Intrepid Ibex (8.10). The issue may affect other machines/versions.
Instructions for installing 8.10 on the Aspire One are here: AspireOne110L.
SD card doesn't mount after suspend
On resuming after suspend I found my SD card (in the Aspire One's lh slot) wouldn't remount - generated a warning message about not having the necessary permissions to mount the card.
The default fstb setting sets permissions for the card to 'root' - it appears that after suspend the system is trying to mount the card as 'user'.
This is what the card's line in fstab looked like before I edited it:
UUID=DB59-1105 /media/AXIOM2 vfat defaults,utf8,umask=0 0 2
Setting ownership to 'user' in fstab means the drive will mount after suspend. (You'll see the term 'defaults' in the SD card's line in fstab; change this to 'user'.)
You can read/edit the fstab file like this:
sudo gedit /etc/fstab
(Keep a commented-out copy of the line you are playing with...)
Multiple copies of an SD card mount
The drive will now mount after suspend, but a new copy of the drive mounts each time you resume from suspend; resulting in a long list of duplicated SD cards in the file browser.
There is a bug report re behaviour similar to this.
I tried to fix that with an unmount script in /etc/acpi/suspend.d, but I'm not convinced that runs; it didn't fix the problem.
Setting fstab to reference the drive by /dev/mmcblk3p1 (rather than UUID) appears to fix things - a single copy of the drive now mounts after suspend.
My line for the SD card in fstab now looks like this:
/dev/mmcblk3p1 /media/AXIOM2 vfat user,uid=1000,gid=100,utf8,umask=0 0 2
(Drive Manager alerts to 'new partitions detected' on start-up and offers to manage it, which I assume will rewrite the UUID into fstab, resulting in multiple mounts again).