Public bug reported: Linux-raspi2 has both the upstream and downstream pi mmc modules enabled. In dmesg I get this error:
Error: Driver 'sdhost-bcm2835' is already registered, aborting... I asked on the Raspberry Pi forums [1] about this and PhilE (Raspberry Pi engineer) answered: "For general guidance, in the Raspberry Pi kernels we use the bcm2835-sdhost driver for the SD card or EMMC interface and bcm2835-mmc for SDIO to the WiFi chip. Upstream uses bcm2835 for SD and sdhci-iproc for SDIO." I'm not entirely sure what the config used in raspbian is, but I think it is this: # # MMC/SD/SDIO Host Controller Drivers # CONFIG_MMC_BCM2835_MMC=y CONFIG_MMC_BCM2835_DMA=y CONFIG_MMC_BCM2835_PIO_DMA_BARRIER=2 CONFIG_MMC_BCM2835_SDHOST=y # CONFIG_MMC_DEBUG is not set # CONFIG_MMC_ARMMMCI is not set CONFIG_MMC_SDHCI=y CONFIG_MMC_SDHCI_PLTFM=y # CONFIG_MMC_SDHCI_OF_ARASAN is not set # CONFIG_MMC_SDHCI_OF_AT91 is not set # CONFIG_MMC_SDHCI_CADENCE is not set # CONFIG_MMC_SDHCI_F_SDH30 is not set # CONFIG_MMC_SDHCI_IPROC is not set CONFIG_MMC_SPI=m # CONFIG_MMC_DW is not set # CONFIG_MMC_VUB300 is not set # CONFIG_MMC_USHC is not set # CONFIG_MMC_USDHI6ROL0 is not set # CONFIG_MMC_BCM2835 is not set # CONFIG_MMC_MTK is not set # CONFIG_MMC_SDHCI_XENON is not set # CONFIG_MEMSTICK is not set CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=y # CONFIG_LEDS_CLASS_FLASH is not set # CONFIG_LEDS_BRIGHTNESS_HW_CHANGED is not set I'll run apport to collect the Ubuntu configs and dmesg logs etc. [1] https://www.raspberrypi.org/forums/viewtopic.php?f=71&t=210225 ** Affects: linux-raspi2 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1762835 Title: Conflicting mmc modules built in To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1762835/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
