>> i compile cdc-acm.c with #define DEBUG and attach kernel messages:
>> kern1.log - first call via pppd, modem dial ok, but freeze after
>> disconnect
>> kern2.log - second call, modem don't respond
>>
>> what information is necessary?
ON> Please try the attached patch.
it remove warning, but
syr> i compile cdc-acm.c with #define DEBUG and attach kernel messages:
syr> kern1.log - first call via pppd, modem dial ok, but freeze after
syr> disconnect
syr> kern2.log - second call, modem don't respond
kern1.log
Description: Binary data
kern2.log
Description: Binary data
i have some troubles with my acm modem (zyxel uno) under linux kernel
2.6.8.
always after pppd disconnect modem freeze (it don't respond to any
command; on modem body usb and data led on, other - off).
more details:
- i try both ohci and uhci controllers.
- with kernel 2.6.7 i don't see this pr
syr> now i see warnings in kern.log if exist dialup ppp-connection on
syr> acm-modem. i don't know is it usb-related or not.
and after next messages:
Aug 16 23:39:47 topalm2 kernel: Debug: sleeping function called from invalid context
at mm/slab.c:1989
Aug 16 23:39:47 topalm2 kernel: in_atomic()
>> AS> Your kernel log did not show the part where the USB subsystem stopped
>> AS> working. It only showed the part where you did rmmod.
i'm upgraded to 2.6.8.1 and send more informartion if problem be
repeated
now i see warnings in kern.log if exist dialup ppp-connection on
acm-modem. i don't
>> >> second bug with ftdi usb/serial converter. you can see kernel output
>> >> in kern1.log
>>
>> AS> This is a known bug. It happens sometimes when you rmmod one of the USB
>> AS> host controller drivers while devices are plugged in and in use by usbfs.
>> AS> To avoid this bug, either don't
>> i use kernel 2.6.7 with both uhci/ehci and ohci controllers on smp
>> box.
>>
>> i have two very infrequent bugs (once or twice a month for me).
>>
>> first bug with usb-connected palmos based PDA (like palm tungsten).
>> i use usbfs (libusb) for access to the usb devices (i don't use kernel
>
syr> you can see kernel output in kern.log
oops, i don't attach files in last lettter
kern.log
Description: Binary data
kern1.log
Description: Binary data
i use kernel 2.6.7 with both uhci/ehci and ohci controllers on smp
box.
i have two very infrequent bugs (once or twice a month for me).
first bug with usb-connected palmos based PDA (like palm tungsten).
i use usbfs (libusb) for access to the usb devices (i don't use kernel
visor module).
you ca
uname -a
Linux topalm2 2.6.6-rc2-bk2 #7 SMP Fri Apr 23 19:21:27 MSD 2004 i686 GNU/Linux
part of dmesg output:
uhci_hcd :00:03.0: port 2 portsc 008a
hub 1-0:1.0: port 2, status 100, change 3, 12 Mb/s
usb 1-2: USB disconnect, address 16
each time on serial port close i get this message in kern.log:
drivers/usb/serial/ftdi_sio.c: Error unlinking read urb
i can ignore it?
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>> it's lastest firmware version.
>> it's possible determine what it is - linux-related problem, firmware
>> problem or any hradware prolem?
DB> The symptom you gave is of a firmware bug. The vendor should
DB> of course fix such bugs, because they warrantied that their
DB> product would work. In
>> i use zyxel uno modem (usb 56k cdc-acm modem, i think it present only
>> on russian market). after two or more hours of connection this modem
>> can hang-up - all leds are on and modem don't respond. i need do power
>> off to reset modem.
DB> Sounds like a firmware bug. Can you get updated fir
in previous message i include very big kern.log part, oops is in
bottom. i extract error messages:
Unable to handle kernel NULL pointer dereference at virtual address 0005
printing eip:
f88fb9c2
*pde =
Oops: [#8]
PREEMPT SMP
CPU:0
EIP:0060:[]Not tainted
EFLAGS: 00010
i use zyxel uno modem (usb 56k cdc-acm modem, i think it present only
on russian market). after two or more hours of connection this modem
can hang-up - all leds are on and modem don't respond. i need do power
off to reset modem.
question - it's possible do software turn power off/on on usb device
>> EIP is at releaseintf+0x5e/0x8c
DB> Looks like "usbfs problem" instead. Maybe your "coldsync" program
DB> can be modified to make usbfs less unhappy.
i don't know how do it
but after small changes (kernel upgrade to 2.6.3-rc2 and moving other
usb devices to additional pci usb controller) sys
i get similar error today:
usb 2-1: new full speed USB device using address 5
usbfs: USBDEVFS_CONTROL failed cmd coldsync dev 5 rqt 194 rq 4 len 20 ret -32
usbfs: USBDEVFS_CONTROL failed cmd coldsync dev 5 rqt 194 rq 4 len 20 ret -110
usb 2-1: USB disconnect, address 5
usb 2-1: control timeout on
>> EIP is at releaseintf+0x5e/0x8c
DB> Looks like "usbfs problem" instead. Maybe your "coldsync" program
DB> can be modified to make usbfs less unhappy.
i want find and correct error source.
can everyone help me with it?
today i found other problem: if i run pppd on acm modem (zyxel omni
uno 56
after several days uptime ohci on my linux box stop work.
if i run
# rmmod ohci_hcd; modprobe ohci_hcd
all work again.
i attach part of dmesg output to this message.
what information is necessary to detect problem source?
ps: i use 2.6.1 kernel with serverworks chipset
dmesg.
Description: Bina
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