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‎06-19-2023 07:07 AM

HP Recommended
Product: HP t540 Thin Client (9MR33AV)
Operating System: Linux

Good morning,

 

I bought a hundred HP t540 thin clients for my company.
Instead of using ThinPro, we build our own Linux distribution.

 

We are experiencing a strange issue.
If we restart the thin clients, the MMC disk disappears completely from the bios (and if we boot from a USB key, the latter is also absent from the OS)
As a symptom, we can notice that the disk activity led flashes non-stop.
A power-off of the PC is enough to recover the disk.

 

The problem only occurs when you start a restart from the OS.

 

We switched to the latest LTS version of the kernel (6.1), the problem is still present 😞
Same behavior if we install Ubuntu 22.04 or Debian Bookworm and reboot from these OS.

 

This is reproducible on all the t540s in our fleet (I just checked on a good dozen of them, so I consider that they all have the problem :D)

 

This is rather annoying because in our update policy, there is an automatic restart. Or if the user restarts the PC, he comes across a blue screen that says "Boot Device Not Found / Hard Disk (3FO)".

 

For all intents and purposes, here's what I have in /sys/block/mmcblk0/device/uevent:
DRIVER=mmcblk
MMC_TYPE=MMC
MMC_NAME=hA8aP>
MODALIAS=mmc:block

 

Does anyone have any ideas to solve this problem?

 

Thanks in advance,
Good day,
Gregory

 

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