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[Bug 832641] Re: cdc-acm modems do not work properly using 7E1 byte format

 

Owen Duffy, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest server release of
Ubuntu? ISO images are available from http://releases.ubuntu.com/raring/
.

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: bios-outdated-f9 needs-upstream-testing

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/832641

Title:
  cdc-acm modems do not work properly using 7E1 byte format

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have tried two apps (minicom and smsclient) with to ACM modems, and received 7E1 data does not have the parity bit stripped. I can check with STTY and it shows parenb cs7 -parodd when the port is being used in 7E1 format, but the received data has the parity bit passed through to the app.
  The ACM modems work fine in 8N1 mode.
  An ordinary RS232 modem on ttyS0 works fine with both apps using 7E1 format, and the parity bit is stripped from receive data (ie only 7 bits passed to the app).
  This may be a long standing problem, possibly in the CDC-ACM driver.

  Using oneric, server.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D2c', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info: Error: [Errno 2] No such file or directory
  Card0.Amixer.values: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 11.10
  HibernationDevice: RESUME=/dev/sda3
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. G41M-ES2L
  Package: linux (not installed)
  ProcEnviron:
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: root=UUID=f7d3ec47-2e5d-4b37-add9-ef749d80fe10 ro quiet splash
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic-pae 3.0.9
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-14-generic-pae N/A
   linux-backports-modules-3.0.0-14-generic-pae  N/A
   linux-firmware                                1.60
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  oneiric
  Uname: Linux 3.0.0-14-generic-pae i686
  UpgradeStatus: Upgraded to oneiric on 2011-08-21 (132 days ago)
  UserGroups:
   
  WifiSyslog:
   Jan  1 08:00:25 u01 kernel: [501255.880029] usb 2-2: new full speed USB device number 2 using uhci_hcd
   Jan  1 08:00:27 u01 kernel: [501258.250882] cdc_acm 2-2:2.0: ttyACM0: USB ACM device
   Jan  1 08:00:27 u01 kernel: [501258.253097] usbcore: registered new interface driver cdc_acm
   Jan  1 08:00:27 u01 kernel: [501258.253101] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
  dmi.bios.date: 11/04/2009
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F6
  dmi.board.name: G41M-ES2L
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF6:bd11/04/2009:svnGigabyteTechnologyCo.,Ltd.:pnG41M-ES2L:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnG41M-ES2L:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: G41M-ES2L
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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