[Dfu-util] Bug in dfu-util?

Hi everyone! I'm not sure what to make of this, so I thought it's probably a good idea to ask here first before filing a bug. I'm flashing a GigaDevice GD32VF103TB (Pinecil) with dfu-util0.10. I have compiled the latter from source, as there are supposedly some issues with 0.9 and that's not available yet. I have two machines, a Dell notebook and a Razer notebook. Both use the same USB3/Thunderbolt dock. With the Dell machine, I get this output every time I run dfu-util like this: sudo ./dfu-util-0.10/src/dfu-util -l dfu-util 0.10 [cut the disclaimer] Found DFU: [28e9:0189] ver=0100, devnum=17, cfg=1, intf=0, path="5-2.1", alt=1, name="@Option Bytes /0x1FFFF800/01*016Be", serial="3TBJ" Found DFU: [28e9:0189] ver=0100, devnum=17, cfg=1, intf=0, path="5-2.1", alt=0, name="@Internal Flash /0x08000000/128*001Kg", serial="3TBJ" However, when I connect it to my Razer, regardless of "directly" or via the dock, the behaviour is like this: FIRST run of dfu-util -l: sudo ./dfu-util-0.10/src/dfu-util -l dfu-util 0.10 [cut the disclaimer] dfu-util: Cannot open DFU device 28e9:0189 From that, I just get nothing at all, just as if no dfu device was connected at all. Looking into lsusb, the device is present before running dfu-util and gone after running dfu-util. Like I said, I have tested several connections, so my suspicion now is, that - for whatever reason - running dfu-util on my Razer makes the SoC "crash" so that it won't be recognized by the computer any more. However, I don't see a reason for this. I have checked the dfu-util binaries, they are identical. Also libusb versions and even the kernels are identical. So, I'm not sure this is a bug in dfu-util and I have no expertise in debugging this any further :( What could I do from here? Cheers Steffen