796358 - Unchecking USB mass storage while mounted doesn't unmount on Nexus S

Status: RESOLVED DUPLICATE of bug 792506

(Firefox OS Graveyard :: Gaia, defect)

Description

[GH to BZ]

[GitHub issue by autonome on 2012-06-07T21:56:21Z, https://github.com/mozilla-b2g/gaia/issues/1621]
STR:

* check usb mass storage setting on phone
* check that drive shows up in Finder (or whatever your OS)
* uncheck usb mass storage setting on phone

Expected: drive unmounts in Finder (or whatever your OS)

Actual: drive stays connected and accessible

Comment 1

[GH to BZ]

[GitHub comment by autonome on 2012-06-07T21:56:31Z]
Logcat output: http://pastebin.mozilla.org/1658200

Comment 2

[GH to BZ]

[GitHub comment by autonome on 2012-06-07T22:28:04Z]
same on sgs2

Comment 3

[GH to BZ]

[GitHub comment by dhylands on 2012-06-08T00:29:54Z]
This seems to be an issue with the sequence: uncheck UMS enabled, then ejecting from the FInder (Mac specific).

You should eject from the FInder before unchecking UMS. It seems to work properly under linux.

Comment 4

[GH to BZ]

[GitHub comment by autonome on 2012-06-08T00:35:06Z]
That's the bug though :)

If users can do it, they will.

Ideally unchecking the box would unmount. If we can't do that, maybe we should disable the checkbox while it's mounted?

Comment 5

[GH to BZ]

[GitHub comment by dhylands on 2012-06-08T01:47:10Z]
From what I can gatther from reading online, this is actually a problem with the Mac USB stack.
It can be aleviated by disabling adb (currently we enable UMS and adb).

To test this, can you try:

adb shell setprop sys.usb.config mass_storage

This will disable adb. If you power cycle the phone adb should be re-enabled.