socket: 0.293 device: 0.136 other: 0.111 semantic: 0.093 network: 0.078 PID: 0.055 files: 0.055 vnc: 0.041 performance: 0.033 boot: 0.027 graphic: 0.027 permissions: 0.024 debug: 0.022 KVM: 0.006 socket: 0.534 debug: 0.228 network: 0.064 PID: 0.052 files: 0.033 other: 0.027 performance: 0.016 device: 0.014 semantic: 0.009 boot: 0.008 graphic: 0.005 KVM: 0.004 vnc: 0.003 permissions: 0.003 Failed to set NBD socket ubuntu 15.10 & nbd client 3.10 Running command to mount using nbd fails with error /build/qemu-YZq7uh/qemu-2.3+dfsg/nbd.c:nbd_init():L670: Failed to set NBD socket Can you still reproduce this with the latest version of upstream QEMU? Please also provide the exact steps (e.g. command line options) that you were using here. [Expired for QEMU because there has been no activity for 60 days.]