** Description changed:
I have a program that I wrote that controls an Onkyo audio receiver through
it's serial port. The serial port is opened like this:
- open("/dev/ttyUSB0", O_RDWR | O_NOCTTY);
+ open("/dev/ttyUSB0", O_RDWR | O_NOCTTY);
open never returns. This worked fine in Ubuntu prior to 10.10.
This problem was also discussed in the maverick testing forum:
http://ubuntuforums.org/showthread.php?t=1580150
A workaround was reported that I have verified works for me as well.
modprobe -r pl2303
modprobe pl2303
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 x86_64
NonfreeKernelModules: nvidia
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: aplay: device_list:235: no soundcards found...
Architecture: amd64
ArecordDevices: arecord: device_list:235: no soundcards found...
Date: Fri Oct 15 08:47:39 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: empty empty
PciMultimedia:
-
+
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic
root=UUID=2d5d3af3-523c-4c76-839b-db828167e592 ro quiet splash
ProcEnviron:
- PATH=(custom, user)
- LANG=en_US.UTF-8
- SHELL=/bin/bash
+ PATH=(custom, user)
+ LANG=en_US.UTF-8
+ SHELL=/bin/bash
SourcePackage: linux
dmi.bios.date: 02/27/2009
dmi.bios.vendor: American Megatrends Inc.
- dmi.bios.version: 'V1.01 '
+ dmi.bios.version: V1.01
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: S7002
dmi.board.vendor: TYAN
dmi.board.version: empty
dmi.chassis.asset.tag: empty
dmi.chassis.type: 3
dmi.chassis.vendor: empty
dmi.chassis.version: empty
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr'V1.01':bd02/27/2009:svnempty:pnempty:pvrempty:rvnTYAN:rnS7002:rvrempty:cvnempty:ct3:cvrempty:
dmi.product.name: empty
dmi.product.version: empty
dmi.sys.vendor: empty
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https://bugs.launchpad.net/bugs/661321
Title:
Opening /dev/ttyUSB0 hangs, pl2303.ko module
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