Red Hat Bugzilla – Bug 561185
DeviceKit misidentifies LG Vu CU920 phone as Qualcomm device.
Last modified: 2010-12-03 18:25:09 EST
Description of problem: Via lsusb phone can be either identified as ID o5c6:1000 Qualcomm or ID 1004:6000 LG Electronics when hot plugging. Mostly as the Qualcomm device.
Version-Release number of selected component (if applicable):DeviceKit-disks-devel-009-3.fc12 (x86_64)
How reproducible: Every time.
Steps to Reproduce:
1.Set phone as USB device.
2.Plug USB cable in.
Actual results: Cannot access USB files on phone. Palimpsest does not list the device.
Expected results: Access USB files.
Additional info:If computer is started with phone connected, bootup hangs. Looks like gdm never starts or fails.
and why is this a udev problem?
can you run
# udevadm control --log-priority=debug
and then plug in the phone and attach the udev messages in /var/log/messages
Might be udev, might be kernel, not sure. But it's not DeviceKit, as that's dead.
Created attachment 388617 [details]
Messages from udevadm control --log-priority=debug
I filed this bug against DeviceKit because the phone worked fine in F10. After I upgraded to F12, no phone. No joy from the forums, so I assumed that udev was missing a rule. So I decided to write my own. While researching how to do that I learned about DeviceKit. Aha! No DeviceKit in F10. DeviceKit is in F12. So I figured DeviceKit must be the chigger in the woodpile.
If I'm wrong, then my apologies to the fine gentleman working on DeviceKit!
/sbin/modprobe -b usb:v05C6p1000d0000dc00dsc00dp00ic08isc06ip50
modem-modeswitch -v 0x05c6 -p 0x1000 -t option-zerocd
you could try to comment out the modeswitch command in
you might also want to play with usb_modeswitch
I commented that line in /lib/udev/rules.d/61-option-modem-modeswitch.rules and that seems to have done the trick while hotplugging. Icon comes up on the desktop and Palimpsest can see the drive.
Still have the problem of boot hanging while the phone is connected at start-up but I can live with that. Thanks!
The problem here is that this USB ID is *also* the USB ID of a popular Option NV 3G modem (the iCON 7.2) before the modem is modeswitched. So even if you move to usb_modeswitch, you'll still have the problem where the LG phone is modeswitched by usb_modeswitch most likely.
Qualcomm makes the chipset that's in both the LG phone and the Option NV modem, and apparently both vendors didnt' bother to change the USB ID before the modeswitch occurs. So we have two hugely different devices with the same pre-switch USB ID.
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