Just my two-cents: I noticed the same bug on both Ubuntu workstation as well as Kubuntu, but my Ubuntu server does not seem to have the same problem. All three are running 18.04 with the 4.15.0.36 kernel.
I tested all three when they were freshly installed (kernel 4.15.0-29-generic) and after upgrade (kernel 5.15.0-29-generic). I tried three scenarios (none of them used 'numdummies'): 1. Add "dummy" module to /etc/modules 2. Add "dummy" module to /etc/modules-load.d/dummy.conf 3. Add a dummy device with /etc/systemd/network/01-dummy0.netdev All three scenarios worked on ubuntu server, but none of them on the desktops, even though the dummy module was listed in lsmod. I wish I had time to troubleshoot more, but I'm just investigating a possible switch from fedora to Ubuntu, and thinks are not looking too good for ubuntu... Five months into their supposed LTS release and several packages I rely on cannot be installed because it does not support 18.04, and now this... Anyway, just thought I'd mention the working server... Good luck... -- 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
