[ELEMI] Issue with UEFI FULL ROM eMMC/MicroSD [non-bootable]

PD-Kerman · August 19, 2024, 2:28am

Re-distribution of issue posted on GitHub

this thread was reformatted and meant to be much briefer and streamlined

More info in the original GitHub issue thread, links below:

github.com/MrChromebox/firmware

ELEMI: MicroSD & eMMC not bootable / not able to be recognized by the firmware and lead to ' failed: verify it contains a 64-bit UEFI OS ' error, RECURRENT of #572 with extra eMMC non-bootable malfunction

opened 11:24AM - 18 Aug 24 UTC

PD-Kerman

Hellow there, _this is a copy of a comment i posted in the following issue which… was closed and considering the previous thread was rather old so im posting this thread and the original thread would be mentioned below_ **_--it behaves almost the same as it was in the issue #572 which should be fixed months ago_** **I just got a elemi / hp c640 g2 here and seems like the issue still remains on this model, which it doesnt seem like i could boot the system from the microsd card in the slot~** - **_ill first paste the brief post on discord (chrultraboook) but unfortunately there r no support on the discord server~_** ![QQ_1723978137283](https://github.com/user-attachments/assets/7f97b744-9ebf-4508-854a-543c49ffbed3) # So after reading all previous comments/discussions under this thread, i guess ill just firstly post these infos cuz they should be related most: - **FW_VER: Okey so firstly, i just ran the installation script today, and the date of the firmware seems to be 06/15/2024 as its been shown here** ![b4cba7a546945f70918a0c5d28282cfd_720](https://github.com/user-attachments/assets/47b7f676-46e0-4a09-9c05-fa89bade6fcd) - **BOOTMENU: And according to the previous discussion i noticed that i the device should still being displayed in the boot menu regardless of whether its bootable so the following attachment show that the microsd card was nicely plugged in and i can confirm that it was recognized in all installation media and its been tested usable** ![08e5245608eec1c74da6994fa2cd5017_720](https://github.com/user-attachments/assets/714297d1-5d43-4a82-9159-3697a06d29b0) ![dfcd588cddbd3429b2dbea889baff3c9_720](https://github.com/user-attachments/assets/b2d18468-6002-4fb6-a7ea-c4dc0dd08e81) - **MISCELLANEOUS: Here's some additional screenshots about the blank file explorer and the UEFI Shell with `map: No mapping found.` notice which seems like no devices were even detected even tho the microsdcard had been inserted** ![442535ee44b46852c1608bd7ac4e6b97](https://github.com/user-attachments/assets/700d4670-1598-42c3-90a0-e24229ba0c64) ![5899214dbfb66f5beef640b562905318](https://github.com/user-attachments/assets/99fe3713-6bd1-4852-8509-f4fc4787dbde) # What have i been trying : **Well i was originally wanted to install the entire operating system on the microsd card in the built in slot cuz the slot could get it locked inside which should be save enough and my internal storage was like i only got 64GB which wasnt enought and speaking of which _the internal eMMC didnt displayed on the firmware as well_** **and i _tried both ubuntu and arch linux and the USB installation media works both perfectectly fine_, and ive attempted to install it to both eMMC and microsd card separately _both didnt boot_ ** _which means yea even tho the microsdcard is bootable/freshly installed, it is still not detectable_ **and about the microsd card its a sandisk extreme 256GB and again works perfectly fine ive been tested it for several times~** ### **P.S. A: the firmware seemed to be taking abnormally long time to boot (the icon phase) after booted without any bootable option for a few times** ### **P.S. B: just tested again and confirmed that the internal eMMC doesnt seem to be boot-able as well, error remains the same** _its kind of a really important feature and i really wish it could be fixed please let me know if any other infos were required :D_ All kinds of help at all would be very much appreciated!~ Thanks in advance _Originally posted by @PD-Kerman in https://github.com/MrChromebox/firmware/issues/572#issuecomment-2295226186_

What Happened:
eMMC/MicroSD Both will not show in BOOTMENU, UEFI SHELL, FILE EXPLORER

P.S. A eMMC → Built-in eMMC

P.S. B MicroSD → In the slot, locked

P.S. C eMMC and MicroSD both detectable in the Operating System / USB installation media

P.S. Occurs regardless of whether eMMC/MicroSD is bootable

ScreenShots:
Uploading in the following [ORDER]

Main menu of the firmware, contains such infos like: firmware version/date, device name, system specs
MicroSD card in place / the slot
Boot Menu [empty]
File Explorer [empty]
UEFI SHELL shows no devices / no mapping found

[Due to policy for ner-users, currently cannot upload more than one embedded media, but luckly the post on github should be right in this order as well, staring with FW_VER section~ :D]

CBMEM DUMP

the following cbmem was dumped in a ubuntu live usb media [usb boot] hopefully it would work, links below, uses the same link as it was on github in order to keep consistency *

cbmem.log

mcirsta · November 17, 2025, 8:33am

I’ve just intalled the latest version of the UEFI FULL ROM on an Elemi with the latest version of the firmware.
Windows still has serious issues with both the SD and eMMC . I suspect it’s an issue with the driver that Windows 11 has, Windows 10 works just fine but doesn’t see the eMMC.
I’m not sure anything can be done about this, maybe just to somehow make a Windows image with a different driver that is working.
Linux works great though, tried systemd-boot , that one didn’t but with Grub and CachyOS it’s all good.

MrChromebox · November 17, 2025, 3:56pm

ELEMI uses a GL9763E PCIe eMMC controller. Support for it was just added in the 2509.2 release. I only tested Linux with the loaner device I had for testing. A quick search shows that the GL975x SD card drivers exist, but I’m not seeing anything for the GL9763E eMMC controller. It simply might not exist.

mcirsta · November 17, 2025, 9:44pm

I appreciate the work, I was able to nicely get Linux working.

There is some sort of a Windows driver, maybe the same as the SD card one because sometimes Windows 11 does see the emmc and the install goes to 75% but it always throes some I/O error.

MrChromebox · November 17, 2025, 9:55pm

either way I don’t think it’s a firmware issue at this point