Created attachment 203481 [details] Syslog output Trying to play Need For Speed Most Wanted Demo using dualshock 4 with weak usb cable connected. When rumble option is set to on it couses system hang after first vibration effect. The cable is 1.8 m long and seems to be somewhat low quality. It's not possible to charge devices with the USB cable, tested with smartphone. It seems it has too high resistance. Tested with two new cables with the same effect. The first symptom while playing is you loose steering control over car - no reaction on gamepad movements. Shortly after that all system freezes completly. It is not possible even to ssh from another computer. Sound actually played by game still plays in loop. Sometimes two diodes on keyboard are blinking: Caps and Scroll. Sometimes you are able to exit game and the hang is deleyed by few minutes. In kernel log you see messages like this: Feb 11 01:19:44 tiger kernel: [41423.015201] usb usb4-port3: disabled by hub (EMI?), re-enabling.. ... Feb 11 01:19:45 tiger kernel: [41423.643404] BUG: unable to handle kernel paging request at 000000000000ff05 Feb 11 01:19:45 tiger kernel: [41423.643451] IP: [<ffffffff811e527b>] kmem_cache_alloc_trace+0x7b/0x1d0 Feb 11 01:19:45 tiger kernel: [41423.643491] PGD 155b8b067 PUD 1c45c3067 PMD 0 Feb 11 01:19:45 tiger kernel: [41423.643518] Oops: 0000 [#1] SMP ... Full logs added as attachement - two versions, with and without apparmor (apparmor=0 kernel parameter).
On Thu, Feb 11, 2016 at 10:40:56AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=112311 > > Bug ID: 112311 > Summary: System hangs with weak USB cable > Product: Drivers > Version: 2.5 > Kernel Version: 3.19, 4.2.0, 4.4.1 Please send to the linux-usb@vger.kernel.org mailing list.