SD card not detected on 4.8.4 (Slate AX / GL-AXT1800) - same issue as 4.8.2/4.8.3 thread

Router
1

Hi,

I'm experiencing the same micro SD card detection issue reported in the 4.8.2/4.8.3 threads, but on firmware 4.8.4.

Symptoms:

  • No /dev/mmcblk0 device appears in /proc/partitions after inserting the card
  • No kernel messages logged on hot insertion (dmesg stays empty)
  • Tested with two different SD cards (different brands/capacities): same result with both, ruling out a card-specific issue
  • Card-detect GPIO works correctly (Got CD GPIO appears in dmesg after driver rebind)
  • SDHCI controller initializes fine (mmc0: SDHCI controller on 7804000.sdhci_sd using ADMA 64-bit)
  • Manual driver rebind produces: mmc0: error -110 whilst initialising SD card

What I checked:

root@GL-AXT1800:~# dmesg
[  632.067569] sdhci_msm 7804000.sdhci_sd: Got CD GPIO
[  632.067642] sdhci_msm 7804000.sdhci_sd: allocated mmc-pwrseq
[  632.071297] sdhci_msm 7804000.sdhci_sd: sdhci_msm_get_ice_device_vops: ICE device is not enabled
[  632.221872] mmc0: SDHCI controller on 7804000.sdhci_sd [7804000.sdhci_sd] using ADMA 64-bit
[  632.243032] mmc0: error -110 whilst initialising SD card
  • Card-detect GPIO and controller probe both work (/sys/class/mmc_host/mmc0/ present, readlink -f shows 7804000.sdhci_sd, driver sdhci_msm)
  • Manual unbind/bind of the driver reproduces the same -110 timeout every time
  • USB storage works perfectly fine on the same unit — this appears isolated to the SD card path

Confirmed workaround: Downgrading to 4.6.11 would likely resolve this based on other reports in the 4.8.2/4.8.3 thread, but I wanted to flag that this regression is still present in 4.8.4, so it hasn't been fixed yet in the stable branch.

SD cards tested:

  • Amazon Basics SD 512Gb
  • 4Gb SD Card (cannot remember the brand right now)

Happy to provide GoodCloud remote access if that helps investigate further, as offered in the other thread.

Thanks!

2

Hi,

Thank you for your report.

Yes, if possible, please follow the guide below and share your device with us via GoodCloud so that we can check it remotely:

Kindly send us the MAC address and the router password via private message so that we can access the device.

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We will then ask our R&D team to investigate the issue remotely and see whether a fix can be implemented.