I've put my flk2 away for half a year, and now i can't make it working: ‰ fl2k_test -s 162e6 Allocating 6 zero-copy buffers libusb: error [submit_bulk_transfer] submiturb failed error -1 errno=2 Failed to submit transfer 0 Please increase your allowed usbfs buffer size with the following command: echo 0 > /sys/module/usbcore/parameters/usbfs_memory_mb /sys/module/usbcore/parameters/usbfs_memory_mb is zero ofc. strace tells me: [pid 9711] openat(AT_FDCWD, "/dev/bus/usb/001/007", O_RDWR|O_CLOEXEC) = 9 ... [pid 9711] ioctl(9, USBDEVFS_SUBMITURB, 0x558af7769f80) = 0 ... [pid 9711] write(2, "Allocating 6 zero-copy buffers\n", 31Allocating 6 zero-copy buffers ) = 31 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f7faa000 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f7bea000 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f782a000 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f746a000 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f70aa000 [pid 9711] mmap(NULL, 3932160, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0x7ff5f6cea000 [pid 9711] ioctl(9, USBDEVFS_SUBMITURB, 0x558af776a5a0) = -1 ENOENT (No such file or directory) Linux 5.5.0-rc6 and osmo-fl2k master here. What am i doing wrong? -- () ascii ribbon campaign - against html mail /\ http://arc.pasp.de/ - against proprietary attachments