SD card reader only works after a suspend/resume
Jakob Alvermark
jakob at alvermark.net
Thu Sep 6 10:33:42 UTC 2018
Hi,
I discovered this by chance.
The SD card reader in my laptop has never worked, but now I noticed it
does after suspending and resuming.
The controller is probed and attached on boot:
sdhci_acpi1: <Intel Bay Trail/Braswell SDXC Controller> iomem
0x90a00000-0x90a00fff irq 47 on acpi0
But nothing happens if I put a card in. Unless I suspend and resume:
mmc1: <MMC/SD bus> on sdhci_acpi1
mmcsd0: 32GB <SDHC SL32G 8.0 SN 19CD02C0 MFG 11/2014 by 3 SD> at mmc1
50.0MHz/4bit/65535-block
Then I can remove and replug cards and it seems to work just fine.
Jakob
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