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I have a situation wherein my linux system (with a 2.6.32 kernel) is not detecting the insertion of an SD card after the system is booted.

It correctly detects the card when the card is inserted before the system boots. Moreover, it can correctly detect the card if I forcibly unload and reload the sdhci and sdhci_pci kernel modules while the card is inserted.

Is there a way that I can get the system to dynamically detect card insertion so that I can provide an appropriate udev rule for automounting?

I understand that there is a way, starting in kernel 2.6.38, to instruct the kernel to poll for block devices. For a number of reasons, I need to find a solution that works with 2.6.32.