Ubuntu
linux-source-2.6.20 package

Oops when attempting to load a speakup synthesizer module for an external serial device.

Bug #82620 reported by Luke Yelavich
4
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Won't Fix
Undecided
Unassigned
linux-source-2.6.20 (Ubuntu)
Won't Fix
Medium
Unassigned

Bug Description

Binary package hint: linux-source-2.6.20

When attempting to load speakup with one of the synthesizer drivers, I get this output from dmesg, followed by what seems to look like an oops.

I think this can even be reproduced without the necessary hardware.

1. Load the speakupmain module.
2. Attempt to load the speakup_dectlk module.

You should get something similar to below. Note that the speakup_dectlk module doesn't load, but messages are spewed to the console until speakupmain is unloaded.

Note you will need to try this on a system that has serial ports on the motherboard.

[ 460.273303] Speakup v-2.00 CVS: Sat Oct 7 10:52:29 EDT 2006 : initialized
[ 460.274183] initialized device: /dev/synth, node ( MAJOR 10, MINOR 25 )
[ 480.448337] synth probe
[ 480.448365] Probing for Dectalk Express.
[ 483.702492] IRQ handler type mismatch for IRQ 3
[ 483.702685] current handler: serial
[ 483.702878] [<c015382e>] setup_irq+0x12e/0x1e0
[ 483.702936] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 483.702971] [<c0153983>] request_irq+0xa3/0xc0
[ 483.703000] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 483.703033] [<c0247d69>] uart_startup+0x49/0x150
[ 483.703061] [<c0247f3e>] uart_open+0xce/0x440
[ 483.703089] [<c0231e34>] check_tty_count+0x14/0xb0
[ 483.703150] [<c02359b7>] tty_open+0x147/0x2f0
[ 483.703177] [<c0235870>] tty_open+0x0/0x2f0
[ 483.703199] [<c01786e8>] chrdev_open+0xa8/0x170
[ 483.703233] [<c0178640>] chrdev_open+0x0/0x170
[ 483.703248] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 483.703297] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 483.703322] [<c0174150>] do_filp_open+0x50/0x60
[ 483.703401] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 483.703435] [<c017428c>] sys_open+0x1c/0x20
[ 483.703454] [<c0103260>] syscall_call+0x7/0xb
[ 483.703496] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 483.703532] =======================
[ 487.857798] Dectalk Express: not found
[ 487.857823] dectlk: device probe failed
[ 488.706143] IRQ handler type mismatch for IRQ 3
[ 488.706257] current handler: serial
[ 488.706374] [<c015382e>] setup_irq+0x12e/0x1e0
[ 488.706430] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 488.706464] [<c0153983>] request_irq+0xa3/0xc0
[ 488.706493] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 488.706525] [<c0247d69>] uart_startup+0x49/0x150
[ 488.706553] [<c0247f3e>] uart_open+0xce/0x440
[ 488.706580] [<c0231e34>] check_tty_count+0x14/0xb0
[ 488.706639] [<c02359b7>] tty_open+0x147/0x2f0
[ 488.706664] [<c0235870>] tty_open+0x0/0x2f0
[ 488.706686] [<c01786e8>] chrdev_open+0xa8/0x170
[ 488.706719] [<c0178640>] chrdev_open+0x0/0x170
[ 488.706734] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 488.706781] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 488.706806] [<c0174150>] do_filp_open+0x50/0x60
[ 488.706882] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 488.706915] [<c017428c>] sys_open+0x1c/0x20
[ 488.706933] [<c0103260>] syscall_call+0x7/0xb
[ 488.706975] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 488.707010] =======================
[ 493.709892] IRQ handler type mismatch for IRQ 3
[ 493.710004] current handler: serial
[ 493.710121] [<c015382e>] setup_irq+0x12e/0x1e0
[ 493.710177] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 493.710210] [<c0153983>] request_irq+0xa3/0xc0
[ 493.710239] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 493.710271] [<c0247d69>] uart_startup+0x49/0x150
[ 493.710299] [<c0247f3e>] uart_open+0xce/0x440
[ 493.710326] [<c0231e34>] check_tty_count+0x14/0xb0
[ 493.710385] [<c02359b7>] tty_open+0x147/0x2f0
[ 493.710411] [<c0235870>] tty_open+0x0/0x2f0
[ 493.710432] [<c01786e8>] chrdev_open+0xa8/0x170
[ 493.710466] [<c0178640>] chrdev_open+0x0/0x170
[ 493.710480] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 493.710528] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 493.710552] [<c0174150>] do_filp_open+0x50/0x60
[ 493.710628] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 493.710661] [<c017428c>] sys_open+0x1c/0x20
[ 493.710680] [<c0103260>] syscall_call+0x7/0xb
[ 493.710721] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 493.710756] =======================
[ 498.713880] IRQ handler type mismatch for IRQ 3
[ 498.714003] current handler: serial
[ 498.714142] [<c015382e>] setup_irq+0x12e/0x1e0
[ 498.714208] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 498.714252] [<c0153983>] request_irq+0xa3/0xc0
[ 498.714285] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 498.714324] [<c0247d69>] uart_startup+0x49/0x150
[ 498.714360] [<c0247f3e>] uart_open+0xce/0x440
[ 498.714393] [<c0231e34>] check_tty_count+0x14/0xb0
[ 498.714450] [<c0120650>] default_wake_function+0x0/0x10
[ 498.714488] [<c02359b7>] tty_open+0x147/0x2f0
[ 498.714526] [<c0235870>] tty_open+0x0/0x2f0
[ 498.714556] [<c01786e8>] chrdev_open+0xa8/0x170
[ 498.714596] [<c0178640>] chrdev_open+0x0/0x170
[ 498.714621] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 498.714679] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 498.714712] [<c0174150>] do_filp_open+0x50/0x60
[ 498.714793] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 498.714831] [<c017428c>] sys_open+0x1c/0x20
[ 498.714854] [<c0103260>] syscall_call+0x7/0xb
[ 498.714905] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 498.714944] =======================
[ 503.717353] IRQ handler type mismatch for IRQ 3
[ 503.717476] current handler: serial
[ 503.717616] [<c015382e>] setup_irq+0x12e/0x1e0
[ 503.717681] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 503.717724] [<c0153983>] request_irq+0xa3/0xc0
[ 503.717763] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 503.717803] [<c0247d69>] uart_startup+0x49/0x150
[ 503.717838] [<c0247f3e>] uart_open+0xce/0x440
[ 503.717874] [<c0231e34>] check_tty_count+0x14/0xb0
[ 503.717942] [<c02359b7>] tty_open+0x147/0x2f0
[ 503.717974] [<c0235870>] tty_open+0x0/0x2f0
[ 503.718006] [<c01786e8>] chrdev_open+0xa8/0x170
[ 503.718045] [<c0178640>] chrdev_open+0x0/0x170
[ 503.718067] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 503.718125] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 503.718155] [<c0174150>] do_filp_open+0x50/0x60
[ 503.718236] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 503.718273] [<c017428c>] sys_open+0x1c/0x20
[ 503.718303] [<c0103260>] syscall_call+0x7/0xb
[ 503.718351] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 503.718394] =======================
[ 507.085342] speakup: unregistering synth device /dev/synth
[ 508.721079] IRQ handler type mismatch for IRQ 3
[ 508.721244] BUG: unable to handle kernel paging request at virtual address f0fd7254
[ 508.721383] printing eip:
[ 508.721450] c01efb6c
[ 508.721458] *pde = 2e0e2067
[ 508.721530] Oops: 0000 [#1]
[ 508.721597] SMP
[ 508.721753] Modules linked in: nfs nfsd exportfs lockd sunrpc video sbs i2c_ec dock container button battery asus_acpi backlight ac ext3 jbd mbcache ipv6 eeprom w83781d hwmon_vid i2c_isa sbp2 parport_pc lp parport sr_mod cdrom floppy i2c_piix4 intel_agp agpgart pcspkr i2c_core shpchp pci_hotplug af_packet evdev jfs usb_storage libusual piix generic sg sd_mod siimage ata_piix tulip hpt366 ohci1394 ieee1394 ehci_hcd pata_sil680 aic7xxx scsi_transport_spi uhci_hcd usbcore ata_generic libata scsi_mod dm_mod raid0 md_mod thermal processor fan fbcon tileblit font bitblit softcursor vesafb capability commoncap
[ 508.725441] CPU: 1
[ 508.725445] EIP: 0060:[<c01efb6c>] Not tainted VLI
[ 508.725452] EFLAGS: 00010097 (2.6.20-6-generic #2)
[ 508.725667] EIP is at vsnprintf+0x44c/0x5f0
[ 508.725743] eax: f0fd7254 ebx: c04324d4 ecx: f0fd7254 edx: fffffffe
[ 508.725829] esi: c0360400 edi: f0fd7254 ebp: c04328c0 esp: ef41bd38
[ 508.725909] ds: 007b es: 007b ss: 0068
[ 508.725985] Process brltty (pid: 3900, ti=ef41a000 task=c16f6560 task.ti=ef41a000)
[ 508.726065] Stack: c039d7b0 c039d7ac 00000000 00000001 ef41bd6c c011e188 00000000 00000400
[ 508.726557] c04324c0 00000000 ffffffff ffffffff ffffffff 00000086 c03604fc 00000400
[ 508.727051] f0fd7254 00000000 00000000 c01efe44 ef41be18 00000003 c012640a ef41be14
[ 508.727544] Call Trace:
[ 508.727690] [<c011e188>] __wake_up+0x38/0x50
[ 508.727867] [<c01efe44>] vscnprintf+0x14/0x20
[ 508.727994] [<c012640a>] vprintk+0x5a/0x370
[ 508.728164] [<c015b5e7>] get_page_from_freelist+0x2a7/0x370
[ 508.728315] [<c012673b>] printk+0x1b/0x20
[ 508.728441] [<c0153829>] setup_irq+0x129/0x1e0
[ 508.728594] [<c024c6c0>] serial8250_interrupt+0x0/0x100
[ 508.728733] [<c0153983>] request_irq+0xa3/0xc0
[ 508.728866] [<c024c608>] serial8250_startup+0x488/0x4b0
[ 508.729008] [<c0247d69>] uart_startup+0x49/0x150
[ 508.729143] [<c0247f3e>] uart_open+0xce/0x440
[ 508.729276] [<c0231e34>] check_tty_count+0x14/0xb0
[ 508.729443] [<c02359b7>] tty_open+0x147/0x2f0
[ 508.729576] [<c0235870>] tty_open+0x0/0x2f0
[ 508.729702] [<c01786e8>] chrdev_open+0xa8/0x170
[ 508.729841] [<c0178640>] chrdev_open+0x0/0x170
[ 508.729962] [<c0173f3a>] __dentry_open+0xba/0x1c0
[ 508.730118] [<c01740f5>] nameidata_to_filp+0x35/0x40
[ 508.730249] [<c0174150>] do_filp_open+0x50/0x60
[ 508.730432] [<c01741ae>] do_sys_open+0x4e/0xf0
[ 508.730570] [<c017428c>] sys_open+0x1c/0x20
[ 508.730694] [<c0103260>] syscall_call+0x7/0xb
[ 508.730841] [<c02e0033>] unix_gc+0xa3/0x3c0
[ 508.730979] =======================
[ 508.731049] Code: fd ff ff c6 03 25 e9 1b fd ff ff 8d 4f 04 89 4c 24 50 8b 3f 81 ff ff 0f 00 00 77 05 bf a1 9c 36 c0 8b 54 24 2c 89 f9 89 c8 eb 06 <80> 38 00 74 07 40 4a 83 fa ff 75 f4 29 c8 89 c6 8b 44 24 28 f6
[ 508.734077] EIP: [<c01efb6c>] vsnprintf+0x44c/0x5f0 SS:ESP 0068:ef41bd38
[ 508.734249]

Revision history for this message
Luke Yelavich (themuso) wrote :

Ok after further testing, and attempting to use the same device on another machine, it turns out that the oops is an SMP related issue. Attempting to use the speakup_dectlk module on another machine with the serial device states that the device cannot be found, even though I am able to send it data using minicom, and get other user-space apps to talk to it.

Revision history for this message
Tim Gardner (timg-tpi) wrote :

Please try the upcoming 3/22/2007 Feisty Beta. Remember to attach, do not inline.

dmesg > dmesg.txt
lspci -vv > lspci.txt

Tim Gardner (timg-tpi)
Changed in linux-source-2.6.20:
assignee: nobody → ubuntu-kernel-team
importance: Undecided → Medium
status: Unconfirmed → Confirmed
Revision history for this message
Launchpad Janitor (janitor) wrote : This bug is now reported against the 'linux' package

Beginning with the Hardy Heron 8.04 development cycle, all open Ubuntu kernel bugs need to be reported against the "linux" kernel package. We are automatically migrating this bug to the new "linux" package. However, development has already began for the upcoming Intrepid Ibex 8.10 release. It would be helpful if you could test the upcoming release and verify if this is still an issue - http://www.ubuntu.com/testing . If the issue still exists, please update this report by changing the Status of the "linux" task from "Incomplete" to "New". We appreciate your patience and understanding as we make this transition. Thanks!

Revision history for this message
Leann Ogasawara (leannogasawara) wrote :

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

Revision history for this message
Launchpad Janitor (janitor) wrote : Kernel team bugs

Per a decision made by the Ubuntu Kernel Team, bugs will longer be assigned to the ubuntu-kernel-team in Launchpad as part of the bug triage process. The ubuntu-kernel-team is being unassigned from this bug report. Refer to https://wiki.ubuntu.com/KernelTeamBugPolicies for more information. Thanks.

Revision history for this message
Amit Kucheria (amitk) wrote :

This bug report is being closed because we received no response to the previous inquiry for information. Please reopen if this is still an issue in the current Ubuntu release, Jaunty Jackalope 9.04 - http://www.ubuntu.com/getubuntu/download. If the issue remains in Jaunty, please test the latest upstream kernel build - https://wiki.ubuntu.com/KernelMainlineBuilds . To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

Changed in linux (Ubuntu):
status: Incomplete → Won't Fix
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