Mint 19.1 won't recognize 128GB microSDXC UHS-1 SD CARD

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B2WJ
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Re: Mint 19.1 won't recognize 128GB microSDXC UHS-1 SD CARD

Post by B2WJ » Fri Sep 06, 2019 4:42 pm

A few days late here, unfortunately, but having troubleshot the very same problem (viewtopic.php?f=49&t=297176&p=1654116&h ... b#p1654116) as @WildAlaska some weeks back I can confirm the issue involves internal hardware. My situation:

JMicron Technology Corporation x64 "multi-in-1 media card reader," version 1.0.71.1, fitted into:
2012 ACER Aspire Z1620 running Mint 19.1.
WILL READ SanDisk Extreme Plus 128GB micro SDXC.

Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01), Realtek version 6.3.9600.28156, fitted into:
2014 ACER Aspire E1-731 running Mint 19.1 with Windows 10 dual-boot.
WILL NOT READ SanDisk Extreme Plus 128GB micro SDXC. Lower capacity cards are read in Mint, but 128GB is only read on the Windows 10 side.

NOTE: I listed driver versions for comparisons, because version numbers relate only to MS Windows. Linux does not use proprietary drivers.

I received and tried, through these forums, the very same advice as WildAlaska. I also switched between two "Extreme Plus" 128GB cards, switched adapters, and used other adapters. Nothing worked. I can confirm with WildAlaska card format is not an issue. Inputs in this and Ubuntu forums consistently show Realtek not reading 128GB cards through Mint. It's the hardware, pure and simple: the Realtek reads 32GB microSDHC; I don't have 64GB cards so cannot confirm where the limit occurs. Reluctantly, I accepted the advice that the only solution is an external card reader. Though inexpensive, I've not yet purchased an external reader because I can "see" the 128GB when inserted into my EPSON wireless printer, and also because I want to see if Mint 19.2 addresses the inconvenience. I have loaded desired files to a USB "stick" then dual-booted to Windows 10 to put the items on the 128GB SD. Then I can at least use the SD on my PC with the JMicron reader or on Android. But it's not worth retaining Microsoft simply for a cumbersome work-around given the ever more serious Windows 10 flaws. So I for one will eliminate it as a dual boot when I upgrade in a few days to 19.2.

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michael louwe
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Re: Mint 19.1 won't recognize 128GB microSDXC UHS-1 SD CARD

Post by michael louwe » Fri Sep 06, 2019 9:45 pm

B2WJ wrote:
Fri Sep 06, 2019 4:42 pm
I can confirm the issue involves internal hardware.
.
It could be related to the issue at this link ....... https://www.androidauthority.com/high-c ... ns-690710/ - High capacity microSD cards and Android – Gary explains ; 2016 (Android = Linux-based),
ie certain OEMs, eg Realtek, dared not infringe on M$'s patent rights on exFAT, which is the default format on high capacity microSD cards of more than 32GB = no support for any other OS except for M$'s Windows.
....... Some Android OEMs had to pay M$ patent royalty fees to support exFAT in high-capacity microSD cards.


Last week, M$ has just open-sourced exFAT to the OIN = no risk of OEMs being sued by M$ for supporting exFAT in OSes other than Windows. So, the OEMs of built-in multi-card readers should be including exFAT high capacity microSD card support for non-Windows OS like desktop Linux and Android in their new hardware = old built-in multi-card readers may remain unsupported for exFAT high capacity microSD cards in desktop Linux, unless its firmware can be updated.

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AndyMH
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Re: Mint 19.1 won't recognize 128GB microSDXC UHS-1 SD CARD

Post by AndyMH » Sat Sep 07, 2019 3:33 am

certain OEMs, eg Realtek, dared not infringe on M$'s patent rights on exFAT, which is the default format on high capacity microSD cards of more than 32GB
That explains a lot, I've never had any problems with my 128G and 256G SD cards, but then I'd reformatted them ext4 :)
Homebrew i5-8400+GTX1080 Cinnamon 19.0, 3 x Thinkpad T430 Cinnamon 19.0, i7-3632 , i5-3320, i5-3210, Thinkpad T60 19.0 Mate

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