I have the same reader in a Dell XPS 15 L502x, and the
pciehp.pciehp_force=1 parameter doesn't help, even with kernel 3.0-rc1.
The only way to get the system to detect the reader is either to boot
with a SD card already inserted, or to force an PCI bus rescan after an
SD card is inserted (sudo sh -c "echo 1 > /sys/bus/pci/rescan"). Once
the kernel detects the reader, there's no need to rescan.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/768497
Title:
Acer Aspire 5943G JMicron devices not seen unless system boots with SD
card inserted
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