On Mon, Sep 25, 2023 at 10:13 PM Jeffrey Walton <noloa...@gmail.com> wrote: > > On Mon, Sep 25, 2023 at 7:05 PM Albretch Mueller <lbrt...@gmail.com> wrote: > > > > On 9/24/23, Michel Verdier <mv...@free.fr> wrote: > > > If you use USB you need a cable allowing data, some allow only power. > > > > The USB cable I have been using to charge the battery of that phone > > visually seems to be the same exact one being advertised as doubling > > as a data cable, but running: > > $ sudo lsusb > > Before and after plugging in the phone doesn’t show any difference. > > Is there a way to test for sure that cable is the right one? > > It sounds like you are using a charging cable, or a cheap data cable. > I would try a quality data cable before going down the rabbit hole. > > You should also state which USB protocol your phone uses. Different > USB standards have different requirements. For example, USB 1.0 and > 2.0 only need a 4-wire data cable (PWR, GND, D+ and D-). USB-C needs a > 24-pin data cable and must implement the USB-PD protocol. > > Also see <https://www.google.com/search?q=usb+cable+pinouts>.
And one other thing I've found, but I have no explanation for... Sometimes you cannot use an intermediate USB hub. I have a Dell XPS 8930 and Pixel 4a. I also bought a USB 3.0 Hub with power ports for charging from my desktop, <https://www.amazon.com/gp/product/B075NMVGP7>. When I want to use adb, I have to plug the phone directly into the computer. When the phone is directly plugged into the computer, 'adb install <apk>' works as expected. I can also transfer pictures. When plugged into the hub, I can only install small apk's. If the apk is too large, then I get an error when running 'adb install <apk>'. You may experience the same or a similar problem with large file transfers. Like I said, I have no explanation for it. I just know it happens. When I experience it, I plug the phone directly into the computer. Jeff
