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Chuwi Hi10 Pro SD card reader not wrking

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tanux|Post time:1-14-2017 21:57:26 View:7915|Reply:23

intrax| Post time 1-9-2017 11:30:11 From the mobile phone | Show all posts
Yep switching os's seems to cause the problem.. the bios setting ms custom cardbus switches automagically from enabled to disabled when switching. Looks like the dualboot bios is piece of crap!
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pieter| Post time 1-11-2017 07:20:07 | Show all posts
@intrax... anyway to see this happen? Do you have some 1, 2, 3 to reproduce and see some proof?
If so, this may lead to a solution maybe?
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pratamahandy| Post time 1-11-2017 19:55:25 | Show all posts
The Problem Occured not only on Chuwi Hi10 Pro but also Hi12, Hi10, Hi8, and so on. Even it occured at other brand like cube and teclast and some bigger brand like surface (but i am sure the cause of the problem not exactly the same in big brand).

I also had the same problem on my Chuwi Hi10 Pro. At first it worked flawlessly. Both Windows and Android can detect SD Card without Problem. But then the problem occured first at windows. After that I checked the android, the SD Card also not detected there. But after reinsert the SD Card several times, android can detect the SD Card again. (Meanwhile Windows can not detect the SD Card once the problem occured no matter how much you reinsert the SD Card).

After that I reboot Android Several Times and the SD Card still Occured. No Problem at all. Then i try to boot to Windows. The SD still not there. Then I go back to Android. Guess what? The SD Card disappeared again. So Clearly the problem is Windows or Switch OS here.

I try several solution. Enable the ms custom cardbus, change the sdbus from acpi to cpi at bios (works but only for 1 boot after that the sd disapeeared again from windows), and install the windows 8 driver. Nothing works. The SD card wont appeared at Windows and always make the sd card dissapeared from android (after i try to reappeared it in Android by reinsert SD card several times).

Then I decide to completely uninstall the driver on Windows. After the SD card in android reappeared. I go back to Windows then go back to android again. Then Guess what. The SD card is fine. Try to changing OS several times. The SD card still works flawlessly on Android. This leave the driver in Windows (windows 10 driver, windows 8 driver, all existing driver) the only suspect of the cause of the problem. But not all devices has this problem, that means the driver work well on some devices and cause problem on some devices. That means we have another suspect, the internal card reader.

So my analysis is this :
1. The problem is both the software and the hardware. The software is the Driver in Windows. The hardware is the internal card reader (the cheapest price for this thing only 1$ in market but cause so much problem).

2. Since this problem is not occured at all devices (maybe 10% or 20%, I dont know but significant enough to fill this forum with same report), so the driver is not the only suspect, since the driver is digital thing and must be exactly the same all over the world. Meanwhile The Internal Card Reader is hardware and more prone to defect.

3. We who have this problem get unit with "defect" internal card reader that could works flawlessly in Android, but will be broken temporarily by Windows driver. I dont know maybe the voltage too high or too low or anything else. But the damage is temporary so if the voltage is too high it will break the internal card reader permanently, maybe the voltage is too low and the setting dont change when reboot so the android also cant detect the sd card and we have to reinsert the sd to make the internal card reader works again. Or it have nothing to do with voltage I dont know. The sure thing is our internal card reader is defect and windows driver will break it temporarily.

4. Windows driver works okay with "undefect" internal card reader. if it occured at 100 percent of devices then the driver is the only problem.

The Solution :

1. For Now, I Uninstall the windows intel sd host driver which contain the sd storage controller. Ever since, the Android is never fail to detect the SD card after it first reappeared. But of course you have no SD Card on Windows. Well at least I can use the SD card in Android even after switching OS.

2. Find a driver which works on Windows and wont break the Internal SD Card reader temporarily. But its dificult. I try all existing driver, it wont work and will break the internal card reader temporarily.

3. Someone out there (maybe Microsoft or Chuwi, or anyone) build a new driver which will work for defect internal card reader. But the defect maybe not homogen. It will be very hard to make driver which will work on all defect internal card reader.

4. Chuwi customer care? Yeah good luck with that. I know something after a while. They only care about selling the product and doesnt really care about after sales services. So many salesman, but no programmer, no engineer. Yeah, good strategy to destroy your well started business.

Well I guess that's what i can share about what i know about this problem. Hope this helps. Thank You
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pieter| Post time 1-12-2017 02:39:52 | Show all posts
And where do I find the ms custom cardbus setting?
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pratamahandy| Post time 1-12-2017 04:28:28 From the mobile phone | Show all posts
bios. when boot before selecting os, press f7. go to bios. check there.
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fortikeco| Post time 1-12-2017 12:45:17 | Show all posts
Edited by fortikeco at 1-12-2017 13:34

As I now understand, chuwi (and others like teclast, onda etc) devices just make use of InsydeQ2S, an external UEFI made by Insyde Software, specifically designed to run Windows 10 and Android 5.1 on cherry trail devices.
This means that, if the sd-card problems is indeed caused by the dual-boot UEFI, chuwi, teclast, onda etc probably cannot do much about it directly.

Teclast is having the same problem, and confirms that the sd-card problems really seems to be the InsydeQ2S UEFI software (MS Custom Sdbus Driver flipping):
https://techtablets.com/forum/topic/x80-pro-sdcard-problem/

A solution perhaps is getting the single-boot version of the UEFI and then installing grub for instance (but you won't be able to easilly switch I think), or a community written UEFI dual-boot.
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Timewind| Post time 1-13-2017 10:28:09 | Show all posts
In my case (Hi10 pro) my external SD card (64GB) is recognized with Windows but not with RemixOS!
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fortikeco| Post time 1-13-2017 11:19:29 | Show all posts
Timewind replied at 1-13-2017 10:28
In my case (Hi10 pro) my external SD card (64GB) is recognized with Windows but not with RemixOS!

But if you enable MS Custom Sdbus Driver in the UEFI/BIOS it should work in RemixOS. That is what intrax is saying.
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pieter| Post time 1-14-2017 13:28:44 | Show all posts
So really that means we need a UEFI update coming from Insyde.

It also means virtually all multiOS chinese tablets, 2in1 and notebooks have this issue. Xiaomi, Onda, Pipo, Teclast, Chuwi... all then potentially suffer from this.


Then again.. I see American Megatrends as BIOS vendor in my Chuwi..
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pratamahandy| Post time 1-14-2017 21:57:26 From the mobile phone | Show all posts
Edited by pratamahandy at 1-14-2017 22:00

Well enable ms custom sdbus driver is not gonna helping. It's enabled. But once the problem occured. The sd card gonna dismounted repetitively. Try to install wake lock power management by darken. Set to partial wake lock. Reinsert your sd card until it appear. Auto start when reboot. Then let's see if it can save your problem in android. It works for me. My suspicion is, the internal card reader is constantly under voltage when the tablet sleep. If it also works in your device, then it's confirmed
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