Hi, I am seeing a problem with KVM where USB pass through is not working on all devices. ERROR: usb_linux_update_endp_table: Broken pipe My "ActivKey" USB device is NOT passed through to my WinXP VM. Other USB devics work fine. Command # qemu-kvm -m 512 -usb /vm/PCCOE_XP/pccoe_xp.img open QEMU Monitor info usbhost usb_add host:xxxx:xxxx ("host:vendor_id:product_id") or (Same for): usb_add host:xxxx.xxxx ("host:bus.addr") Following appears on terminal you ran the qemu-kvm command on: husb: open device 6.6 husb: config #1 need -1 husb: 1 interfaces claimed for configuration 1 husb: grabbed usb device 6.6 usb_linux_update_endp_table: Broken pipe Same with following options: -no-kvm-irqchip -no-kvm-pit -no-kvm HOST/ARCH/Platform info # uname -a Linux svrq4 2.6.25.20-0.1-default #1 SMP 2008-12-12 20:30:38 +0100 x86_64 x86_64 x86_64 GNU/Linux KVM info # rpm -aq kvm kvm-83-6.2 # modinfo kvm filename: /lib/modules/2.6.25.20-0.1-default/weak-updates/x86/kvm.ko license: GPL author: Qumranet srcversion: B9D8A55988A3D85FD59B48E depends: vermagic: 2.6.25.20-0.1-default SMP mod_unload # modinfo kvm-amd filename: /lib/modules/2.6.25.20-0.1-default/weak-updates/x86/kvm-amd.ko license: GPL author: Qumranet srcversion: 85FDF6263FD27D38324ED1F depends: kvm vermagic: 2.6.25.20-0.1-default SMP mod_unload CPU Info # cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9550 Quad-Core Processor stepping : 3 cpu MHz : 1100.000 cache size : 512 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs bogomips : 4405.04 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate processor : 1 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9550 Quad-Core Processor stepping : 3 cpu MHz : 1100.000 cache size : 512 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs bogomips : 4402.09 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate processor : 2 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9550 Quad-Core Processor stepping : 3 cpu MHz : 1100.000 cache size : 512 KB physical id : 0 siblings : 4 core id : 2 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs bogomips : 4401.95 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate processor : 3 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9550 Quad-Core Processor stepping : 3 cpu MHz : 1100.000 cache size : 512 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs bogomips : 4401.65 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate Also occured on KVM-78 Please contact me if you need any other info. Regards, Lance. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html