I notice you have a ton of soft lockup complaints that seem to be related to the nouveau driver. Connect the power adapter to a power source and to the Thunderbolt 4 USB Type-C port with Power Delivery. If 07:00.0 still exists after removal, I would guess the reinsertion problem is in sdhci, not in the PCI core. NOTE: The images in this document may differ from your computer, depending on the computer configuration you ordered. Does an "lspci" after removing the card still show the 07:00.0 device? Can you change config space values, e.g., the PCI_COMMAND register? I expect that an "lspci" before inserting the card will not show the 07:00.0 sdhci device. Perhaps it remains active as a PCI device. I don't know what the expected behavior of the sdhci device is after removal. There's no PCI hot-remove event, and there's no re-insertion event from sdhci. FAT-fs (mmcblk0p1): Volume was not properly unmounted. I uninstalled the Dell Realtek driver from Control Panel, went to the device manager uninstalled the Realtek PCIE CardReader driver from Memory technology devices, shut down and re-booted let Windows 10 20H2 build 19042.804 find it again itself without installing the Dell driver package. I assume the "bad" log was collected after a removal and reinsertion. My Card Reader suffered the same and wasnt working. sdhci-pci 0000:07:00.0: SDHCI controller found The "good" log shows shows a hot-add of 0000:07:00.0 (as well as functions 2, 3, and 4), and successful detection of a new card by sdhci: If I understand correctly, the logs in comment #12 and comment #13 are from a single boot. The original report was that "inserting a sd card into the internal card reader is not recognized by the system." In attachment 72808 (original dmesg without "rescan" workaround), there is no mention of sdhci or any devices on PCI bus 0000:07.
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