Public bug reported: Binary package hint: udev
The bug was discovered while working with emulated USB CDROM device. Usually such devices do not implement all SCSI MMC-3 commands like the normal optical drives and replay with fail in case of unimplemented SCSI request. Bug was reproduced on various lab. boxes with Ubuntu 9.04 and 9.10 installed, thus probably not HW dependent. It possible to reproduce bug the following way, attach usb device to PC, run usb tracer, run command: /lib/udev/cdrom_id /dev/sr1 I receive the following output: ID_CDROM=1 ID_CDROM_MEDIA=1 ID_CDROM_MEDIA_CD=1 ID_CDROM_MEDIA_SESSION_NEXT=20 ID_CDROM_MEDIA_TRACK_COUNT=1 ID_CDROM_MEDIA_TRACK_COUNT_DATA=1 I did a special build of firmware for USB device to fail on reception of SCSI Read Disk Information command, this command is not obligatory for USB CDROM emulator devices according to, so it's quite typical situation. You can find SCSI Read Disk Information request on the attached USB trace. USB trace confirms that device respond with STALL. But ID_CDROM_MEDIA_SESSION_NEXT value appeared in cdrom_id utility output. If we will look into cdrom_id.c and cd_media_info() function we will see that it's only should happen on successful completion of corresponding SCSI request. Ellisys USB Analysis software to read attached USB trace file can be downloaded here: http://ellisys.com/products/usbex260/download.php If USB device do not respond on SCSI READ TOC request correctly broken ID_CDROM_MEDIA_SESSION_LAST_OFFSET variable to be attached to the list as above, which in turn leads to auto-mount failure. As the result of incorrect cd information processing some devices emulating CDROM by various manufacturers we have in laboratory were not automounted by Ubuntu, I will provide some device models soon. ProblemType: Bug Architecture: i386 Date: Wed Sep 29 21:45:45 2010 DistroRelease: Ubuntu 9.10 Lsusb: Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 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: System manufacturer System Product Name Package: udev 147~-6.1 ProcCmdLine: root=UUID=1aca6938-237c-4d90-98c2-9b89bedc767e ro quiet splash ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-22.65-generic SourcePackage: udev Uname: Linux 2.6.31-22-generic i686 XsessionErrors: (gnome-settings-daemon:18874): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed (gnome-settings-daemon:18874): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed (polkit-gnome-authentication-agent-1:18942): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed (synaptic:23635): Gtk-CRITICAL **: gtk_tree_view_unref_tree_helper: assertion `node != NULL' failed dmi.bios.date: 03/27/2006 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0501 dmi.board.name: P5WD2 dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0501:bd03/27/2006:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WD2:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer ** Affects: udev (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 -- cdrom_id utility incorrectly treats failed SCSI requests which leads to incorrect udev events generation https://bugs.launchpad.net/bugs/651277 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
