Ubuntu
linux package

U232-P9 USB Serial adapter not working in Ubuntu 10.10

Bug #660315 reported by Eric Shattow on 2010-10-14

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Fix Released	Low	Andy Whitcroft
	Maverick	Fix Released	Low	Andy Whitcroft

Bug Description

U232-P9 USB Serial adapter supported by mct_u232 kernel driver has regressed in kernel version 2.6.35-22-generic. This same hardware configuration works when I boot kernel version 2.6.32-24-generic.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.34
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.34-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: emigrate 2301 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe9fc000 irq 47'
   Mixer name : 'SigmaTel STAC9228'
   Components : 'HDA:83847616,102801f3,00100201'
   Controls : 27
   Simple ctrls : 18
Date: Thu Oct 14 00:16:19 2010
HibernationDevice: RESUME=/dev/mapper/volzontar-swap
MachineType: Dell Inc. Inspiron 1420
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/mapper/volhostname-root ro splash
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
WpaSupplicantLog:

dmi.bios.date: 12/19/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0DT492
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA10:bd12/19/2008:svnDellInc.:pnInspiron1420:pvr:rvnDellInc.:rn0DT492:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1420
dmi.sys.vendor: Dell Inc.

Tags:

Revision history for this message

Eric Shattow (eshattow) wrote on 2010-10-14:

mct_u232-2.6.35-22-generic.dmesg.txt Edit (5.5 KiB, text/plain)
AcpiTables.txt Edit (120.0 KiB, text/plain; charset="utf-8")
AlsaDevices.txt Edit (461 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (281 bytes, text/plain; charset="utf-8")
ArecordDevices.txt Edit (218 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (58.0 KiB, text/plain; charset="utf-8")
CRDA.txt Edit (257 bytes, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (3.2 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (10.5 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (12.2 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.8 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (780 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (15.8 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (967 bytes, text/plain; charset="utf-8")
PciMultimedia.txt Edit (593 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (1.6 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (4.0 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (298 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (131.0 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (281.1 KiB, text/plain; charset="utf-8")
UserAsoundrc.txt Edit (115 bytes, text/plain; charset="utf-8")
WifiSyslog.txt Edit (17.1 KiB, text/plain; charset="utf-8")

Revision history for this message

Eric Shattow (eshattow) wrote on 2010-10-14:

mct_u232-2.6.32-24-generic.dmesg.txt Edit (6.9 KiB, text/plain)

Worked in 2.6.32-24-generic, mct_u232 debug=1 dmesg output attached.

Revision history for this message

Eric Shattow (eshattow) wrote on 2010-10-23:

Upstream is aware, and a patch "Fix regression introduced by commit f26788da3b342099d2b02d99ba1cb7f154d6ef7b" is up for inclusion with Linux 2.6.37-rc1. http://permalink.gmane.org/gmane.linux.usb.general/37857

Revision history for this message

Eric Shattow (eshattow) wrote on 2010-11-25:

Fix has landed in Mainline 2.6.35.9:

commit 5ed216a908c5273995b2c65c14639c8b3448b065
Author: Johan Hovold <j*****d@g***l.com>
Date: Thu Oct 21 10:49:10 2010 +0200

USB: mct_u232: fix broken close

commit 92ca0dc5ee022e4c0e488177e1d8865a0778c6c2 upstream.

    Fix regression introduced by commit
    f26788da3b342099d2b02d99ba1cb7f154d6ef7b (USB: serial: refactor generic
    close) which broke driver close().

    This driver uses non-standard semantics for the read urb which makes the
    generic close function fail to kill it (the read urb is actually an
    interrupt urb and therefore bulk_in size is zero).

Brad Figg (brad-figg) on 2010-12-04

tags:

added: acpi

Andy Whitcroft (apw) on 2010-12-15

Changed in linux (Ubuntu Maverick):
assignee:	nobody → Andy Whitcroft (apw)
importance:	Undecided → Low
status:	New → Fix Committed
Changed in linux (Ubuntu):
status:	New → Fix Released
importance:	Undecided → Low
assignee:	nobody → Andy Whitcroft (apw)

Revision history for this message

Julian Wiedmann (jwiedmann) wrote on 2011-03-08:

Eric,
the patch you mentioned was released for Maverick with 2.6.35-25.44 - is this still an issue?

Revision history for this message

Eric Shattow (eshattow) wrote on 2011-03-09:

Works for me.

Julian Wiedmann (jwiedmann) on 2011-03-23

Changed in linux (Ubuntu Maverick):
status:	Fix Committed → Fix Released

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U232-P9 USB Serial adapter not working in Ubuntu 10.10

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