Hello Kai-Heng, I see how the fix I provided is included in the 4.4.0, however I don't see it (yet) in 4.15.0. Is there something I need to do to get this fix into 4.15.0, or will it eventually percolate through by itself?
Thanks! -- 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/1802738 Title: cdc_acm driver lacks trival support for Hiro (Conexant) H05228 USB modem Status in linux package in Ubuntu: Fix Released Bug description: I procured a USB modem manufactured by Hiro (model number H50228). This is in fact a Conexant modem, and while some conexant models are supported in cdc_adm, this particular type is not. Hence, when I connect the modem to my system, cdc_adm does not initialize the modem properly, as evidenced by errors reported through journalctl: Nov 10 21:46:10 <snip> kernel: usbcore: registered new interface driver cdc_acm Nov 10 21:46:10 <snip> kernel: cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters Nov 10 21:47:01 <snip> kernel: cdc_acm 4-2:1.0: Zero length descriptor references Nov 10 21:47:01 <snip> kernel: cdc_acm: probe of 4-2:1.0 failed with error -22 Similar errors of this type have been reported previously, and following the resolution for these errors I recompiled the cdc_acm kernel module, after which the modem is successfully registered: Nov 10 21:47:48 <snip> kernel: usbcore: registered new interface driver cdc_acm Nov 10 21:47:48 <snip> kernel: cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters Nov 10 21:48:17 <snip> kernel: cdc_acm 4-2:1.0: ttyACM0: USB ACM device With my modified kernel module, the modem works (at least for the purposes I need it). I will attach the patch once this bug has been opened. I don't know how to submit a patch for formal consideration so need some help on that front... Neither am I sure how to figure out exactly if this was already addressed in an upstream fix. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-138-generic 4.4.0-138.164 ProcVersionSignature: Ubuntu 4.4.0-138.164-generic 4.4.155 Uname: Linux 4.4.0-138-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jacobsma 4053 F.... pulseaudio /dev/snd/controlC0: jacobsma 4053 F.... pulseaudio /dev/snd/controlC2: jacobsma 4053 F.... pulseaudio CurrentDesktop: XFCE Date: Sun Nov 11 11:20:40 2018 HibernationDevice: RESUME=UUID=899fa33b-30cb-41f4-b709-557ad528a5bd InstallationDate: Installed on 2016-03-06 (979 days ago) InstallationMedia: Xubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1) MachineType: System manufacturer System Product Name ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-138-generic root=UUID=70a8bdf6-e697-4112-b584-4b650002555d ro RelatedPackageVersions: linux-restricted-modules-4.4.0-138-generic N/A linux-backports-modules-4.4.0-138-generic N/A linux-firmware 1.157.20 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2018-03-16 (240 days ago) dmi.bios.date: 09/11/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1701 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: M5A78L-M LX PLUS dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1701:bd09/11/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78L-MLXPLUS:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802738/+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
