[Huawei P20 lite] [AOSP 10 v214] exfat not working.

[gitlimes]

Micro SD, USB OTG and NFC not working (Using AOSP 10 v206).
Edit: I'm unable to check USB OTG and NFC, but I know that Micro SD still doesn't work (v214).

[gitlimes]

Micro SD still doesn't work. I can't confirm if USB OTG and NFC work.

[phhusson]

Give more details that "doesn't work"

[gitlimes]

The SD card doesn't show up in any file explorer, and when i boot up the phone, it says "Issue with SanDisk SD card - Tap to fix"
Click to view image
If I tap on the notification, the SD formatting screen shows up.
Click to view image
If I try to format it it says that the SD card is ready for use, but it still doesn't work. The SD card is not corrupted (I can still use in the custom recovery and on my PC).
Sadly I've lost my USB OTG cable, so I can't check if USB OTG works or not, and I can't check if NFC works or not.

Edit: hid the pictures

[phhusson]

ok, please provide logcat after you insert the sdcard

[gitlimes]

logcat_sd.txt

[phhusson]

K issue is 03-16 16:31:08.512 399 29828 E vold : public:179,193 failed to mount /dev/block/vold/public:179,193: Permission denied
I can't see any denial related to that
I can't understand what kind of issue there could be.
Please give the result of:
ls -lZ /dev/block/vold/public:179,193 as root

[gitlimes]

It outputs:
brw------- 1 root root u:object_r:vold_device:s0 179, 193 2020-03-16 16:34 /dev/block/vold/public:179,193

[geppone70]

I found this:

Disable encryption to use Adoptable Storage (or just because you can)

open /vendor/etc/fstab.hi6250
make a backup just in case
find "/dev/block/bootdevice/by-name/userdata /data f2fs nosuid,nodev,noatime,discard,inlinedata,inlinexatt r wait,check,fileencryption=aes-256-xts:aes-256-cts"
remove ",fileencryption=aes-256-xts:aes-256-cts"
factory reset via stock recovery

Is it related to the issue?

[gitlimes]

@geppone70 I can't edit the file... I tried mounting /vendor read-write on FX File Explorer, but I still couldn't edit the file. I tried modifying it from TWRP, and I still couldn't do it...

[gitlimes]

Also, I think i tried removing encryption a long time ago, but it didn't fix the sd.

[geppone70]

I still couldn't edit the file. I'm trying with adb shell but I get always no adb devices in list.

[geppone70]

a 32GB sd works, a 64 GB SD don't work, weird

[phhusson]

is one formatted as exfat, the other as fat32? Le jeu. 9 avr. 2020 à 14:40, geppone70 <notifications@github.com> a écrit :

…

a 32GB sd works, a 64 GB SD don't work, weird — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe.

[geppone70]

exactly, exfat 64GB and fat32 32GB

[phhusson]

Both of them? Le jeu. 9 avr. 2020 à 15:07, geppone70 <notifications@github.com> a écrit :

…

It's fat32 — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#761 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAA4OQ2CGXIYR66VN5FUZ3RLXCAHANCNFSM4I62KPPA> .

[geppone70]

SD 64GB formatted exFAT don't work
SD 32GB formatted FAT32 works

now I've formatted the SD 64GB FAT32 (using IOMEI partition manager software) and SD 64GB works too

[phhusson]

Ok, very good, thanks.
I assume exfat works on stock rom?
Can you give the content of your /proc/filesystems ?
(adb shell cat /proc/filesystems)

[gitlimes]

Yes, exfat works on stock rom.

nodev   sysfs
nodev   rootfs
nodev   tmpfs
nodev   bdev
nodev   proc
nodev   cpuset
nodev   cgroup
nodev   cgroup2
nodev   devtmpfs
nodev   configfs
nodev   debugfs
nodev   tracefs
nodev   sockfs
nodev   bpf
nodev   pipefs
nodev   ramfs
nodev   devpts
        ext3
        ext2
        ext4
        squashfs
        vfat
        msdos
        exfat
nodev   ecryptfs
nodev   sdcardfs
nodev   cifs
        fuseblk
nodev   fuse
nodev   fusectl
nodev   overlay
        f2fs
nodev   pstore
nodev   selinuxfs
nodev   functionfs

[phhusson]

`grep exfat /vendor/etc/selinux/*` ? Le jeu. 9 avr. 2020 à 18:03, Montelion <notifications@github.com> a écrit :

…

Yes, exfat works on stock rom. nodev sysfs nodev rootfs nodev tmpfs nodev bdev nodev proc nodev cpuset nodev cgroup nodev cgroup2 nodev devtmpfs nodev configfs nodev debugfs nodev tracefs nodev sockfs nodev bpf nodev pipefs nodev ramfs nodev devpts ext3 ext2 ext4 squashfs vfat msdos exfat nodev ecryptfs nodev sdcardfs nodev cifs fuseblk nodev fuse nodev fusectl nodev overlay f2fs nodev pstore nodev selinuxfs nodev functionfs — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#761 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAA4OV3JJ3OT4TV2AZKQ3DRLXWT7ANCNFSM4I62KPPA> .

[gitlimes]

grep.txt

[phhusson]

`echo '(genfscon exfat / (u object_r exfat ((s0) (s0))))' >> /system/etc/selinux/plat_sepolicy.cil` (assuming root and rw system) after that reboot, and tell me if exfat starts working Le jeu. 9 avr. 2020 à 18:19, Montelion <notifications@github.com> a écrit :

…

grep.txt <https://github.com/phhusson/treble_experimentations/files/4457373/grep.txt> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#761 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAA4OQLJ2WN3LYNKA2HW7LRLXYQVANCNFSM4I62KPPA> .

[gitlimes]

Nope. I rebooted twice after that, but exfat still isn't working.
The notification now says "Unsupported SanDisk SD card", and if i try to format it, it gets stuck at 20%.

[gitlimes]

Use this formatusb best working ██████████████

Thanks for bumping this >1year old issue without adding anything useful and promoting your own closed-source software at the same time!
I know how to format an SD card, the issue is that exfat didn't work on the GSI.

While I'm at it I'm gonna close this since I no longer have access to that phone. Feel free to open this back up if the issue is still present on newer versions and/or there have been new developments regarding the issue.

[chaoscreater]

I'm having this issue as well. Can this be re-opened?

[gitlimes]

@chaoscreater, reopening this! (again, keep in mind I no longer have access to that phone so I won't be able to help)

[chaoscreater]

@ashmonty that's all good. I have 2 different phones running on A11 GSI with the exact same issue. I can fix this issue on one of them with a custom kernel that supports exFat, but that kernel is unstable and has some other issues and so ideally looking for a solution on the ROM level.....

I've tried to take the vold file from stock ROM and another A11 custom ROM and replaced it in /system/bin and gave it full permissions. Unfortunately, I couldn't even boot after that point.

There was an old Magisk module that does something with vold and provides exfat support, but that one only works for Oreo unfortunately....

UPDATE:

Found my solution!

https://forum.xda-developers.com/t/request-systemless-filesystem-drivers-for-kernel-mode-and-fuse-support.3807617/#post-79685842

[soredake]

Same problem with redmi note 5 pro and latest crdroid 12.1 gsi.

[soredake]

forum.xda-developers.com/t/request-systemless-filesystem-drivers-for-kernel-mode-and-fuse-support.3807617/#post-79685842

This twrp zip is not working for me (unneeded check for bl unlock and files are not writen into /system/xbin), and not everyone have twrp so i repacked this twrp zip into magisk module zip, here:
ntfs-exfat-support.zip

This module disables selinux in order to mount sdcard as i don't want to spend time on learning how to write selinux policies.

[soredake]

https://blog.esper.io/android-dessert-bites-27-exfat-on-pixel-532176849/
Maybe exfat will work in a13 gsi if kernel supports it.