Hey there. Just wanted to say that i'm seeing this on Bionic as well, on one machine with kernel 4.15.0-20-generic and also on a second one with kernel 4.15.0-22-generic. The former obviously hasn't been updated in a little bit. I didn't notice the problem until just now so i can't say if there was ever a time when it was working before.
I *can* say that i have several *Xenial* machines running 4.15.0-15-generic and those don't exhibit the problem. (I don't have `dummy` in my module config on those, but a boot script runs `modprobe dummy` and that automatically creates the interface, which i believe is the expected default behaviour.) On Bionic, it doesn't create the interface unless i manually specify the `numdummies=<num>` option to `modprobe` (as the other reporters have said) or unless i have `ip link add` load the module and create it for me (naturally). I did try adding `dummy` to /etc/modules and `options dummy numdummies=1` to /etc/modprobe.d/dummy-options.conf. systemd-modules-load says that it inserted the module, and i can confirm that with `lsmod`, but, again, it doesn't actually create the interface any more. I can also confirm that, after the module is loaded, i'm missing /sys/module/dummy/parameters — whatever that indicates. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1774731 Title: Missing "/sys/module/dummy/parameters/" subdir on dummy module Status in linux package in Ubuntu: Incomplete Bug description: Hello, On Ubuntu 18.04 (fully updated), the following configuration does not work: File /etc/modprobe.d/dummy.conf with: ---- options dummy numdummies=12 ---- File /etc/modules ---- dummy ---- The module "dummy" is loaded but, there is no 12 dummies NIC cards! The manual workaround is: --- rmmod dummy modprobe dummy numdummies=12 --- I talked on IRC and someone pointed that the dummy module is missing its "/sys/module/dummy/parameters/" subdir, so, I'm filling this bug report now. Cheers! --- AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.15.0-22-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' DistroRelease: Ubuntu 18.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) Package: linux (not installed) ProcEnviron: TERM=screen PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 qxldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-22-generic root=UUID=26330e04-49ed-11e8-9cae-525400a53f07 ro ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-22-generic N/A linux-backports-modules-4.15.0-22-generic N/A linux-firmware 1.173.1 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic uec-images Uname: Linux 4.15.0-22-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.10.2-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-bionic dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-bionic:cvnQEMU:ct1:cvrpc-i440fx-bionic: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-bionic dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1774731/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
