exfat on SD card getting mounted read-only

[Chris Murphy]

On Aug 27, 2014, at 1:00 PM, jd1008 <jd1008 at gmail.com> wrote:
>> 
> Hi Chris,
> I found some cycles to try that out, though
> I knew full well it would lead nowhere, but still
> wanted to show you.
> I backed up the sd card and then inserted it into
> the usb adapter and reformatted it as ext4 and
> inserted it into the sdcard slot in the laptop.
> dmesg shows:
> [ 2123.164767] sdc: detected capacity change from 15931539456 to 0
> [ 2137.362810] mmc0: new high speed SDHC card at address e624
> [ 2137.589888] mmcblk0: mmc0:e624 SU16G 14.8 GiB (ro) <<<<<<<< Look at this!!!
> [ 2137.601275]  mmcblk0: p1
> [ 2137.918757] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)

Ahh I see. Not paying attention, I didn't realize you were formatting it in a USB->SD Card adapter, and then transferring it to the built-in slot in the laptop.

So I'd say it's worth trying a newer kernel, even grabbing a top of the list 3.17rc2 one from koji [1]. Keep the SD Card formatted ext4, insert it, mount it, then 'dmesg > dmesg.txt' and 'lspci -vvnn > lspci.txt' and attach them both to a bugzilla.kernel.org bug report. Let them know what other kernel versions you've tried.


Chris Murphy


[1] You need kernel, kernel-core, and kernel-modules RPMs. Then dnf/yum install *rpm from the same directory.