Changing USB-C Port from charging only to file transfer needs restart

memyselfandi

The USB-C port was limited to 'charging only'. When I needed to transfer files, I tried changing it to every other value but only a restart made the file transfer possible.
Is the restart for this exploit protection intended?

Build: 2024102100

other8026

memyselfandi Did you unplug then plug the device in after changing to another option? I've never had any problems using USB-C, including after changing the setting from "off" or "charging-only".

lost_cause

I've had this issue for 1-2 weeks on P7 also. Typically I leave mine set to off.

memyselfandi

other8026

Yes, I tried every other option plus removing and plugging the cable in each time.

Naudiz

Isn't that intended behaviour?
I mean the only advantage of "Charging only" over "Charging only when locked" is to prevent an attacker who stole your phone in an unlocked state to download your stuff via USB cable. It would be pretty pointless if he could just change the setting himself without locking himself out through a reboot.

lost_cause

Naudiz
I'm not sure if it is intended but the previous behavior for my phone was to not require a reboot.

other8026

Naudiz prevent an attacker who stole your phone in an unlocked state to download your stuff via USB cable

The owner profile's PIN/password needs to be entered to change that setting. So, assuming nobody else knows someone's PIN/password, only the real owner can change it and a reboot would be unnecessary.

other8026

memyselfandi has it always behaved this way, or is this a recent change?

memyselfandi

other8026

This is the first time I've tried this.

lost_cause

IIRC, I first noticed this behavior sometime around the 2 builds prior to A15.

fid02

My folks, I can reproduce!

I did this:

Change the USB-C port setting to "Charging-only"
Rebooted the phone (not sure it's necessary)
Changed the USB-C port setting to "Charging-only when locked"
Inserted a USB drive (one that I regularly use with the phone) when the phone was unlocked
Waited a minute, but it was not detected by the OS. Replugged several times, not detected.
Rebooted the phone
The USB drive is now detected when the phone is unlocked.

Pixel 8
GrapheneOS 2024102100

Wishing you all a splendid day!

Graphene1

Similar happened to me after buying a USB C to jack I changed from charging only and it didn't work. Assumed the adapter was incompatible. Reboot the phone and then it worked as expected.

xxx

For me it stopped working with Android 15.

-> reboot is needed after changing
-> connection to the pc stops when the phone locks <-> this is annoying

de0u

It sounds as if it might make sense to file an issue on the GrapheneOS issue tracker.

matchboxbananasynergy

I have let the team know.

memyselfandi

matchboxbananasynergy

Thank you, have a nice week.

muhomorr

After changing USB-C port setting from "Charging-only" to "Charging-only when locked", try locking and unlocking the device once before using USB-C port. Does it work in that case?

fid02

muhomorr After changing USB-C port setting from "Charging-only" to "Charging-only when locked", try locking and unlocking the device once before using USB-C port. Does it work in that case?

Yeah, that works!

other8026

muhomorr yes, it does for me. I just tried with both my Pixel 6 and Pixel 9 Pro XL.

Tried this on both devices with the same results:

Device is already set to charging-only
Change to charging-only when locked
Try usb drive - doesn't show up
Lock and unlock
Try usb drive again - it does show up