Logitech HD Webcam C270 - Chipmunk Sound

Kielo · 2011-11-07 21:05:47

I'm with the same issue on a Ubuntu 11.10 with Kernel 3.0.1..
Patching the kernel is a damn bad option here due to my hardware, so I kinda downgraded to Kernel 2.6, which works fine.
To me it definitively seems like it's a Kernel bug.
I will probably try the patch and downgrade on my Arch Linux at work, if I think of taking the Webcam along and someone asks me to do so..

Cheers
Kielo

totsilence · 2011-11-07 21:09:35

The patch for this issue will be in Linux 3.2, maybe also in one of the stable releases of Linux 3.1. However the arch linux maintainer backported the patch, so that arch users will have it even in Linux 3.1. The package is already in testing, you can try it if you want, or wait a couple more days until it hits extra!

Kielo · 2011-11-08 08:11:17

Ok, cool.
It seems like I'll have to apply the patch to the Ubuntu, anyways.. Booting 2.6 screws the OS in some weird way, i.e. locking the screen gets the OS freezed -.-
So I'll have to find out how to apply that patch thingy..

But for the Arch I think I can wait for 3.1, I don't need the cam here anyways. And the third PC isn't even in use atm, so I don't really care.
I expect the kernel to be released soon, or am I wrong with that?

Kielo · 2011-11-09 17:12:10

ras0ir wrote:

Here's the steps:
1. Download kernel source from kernel.org (e.g linux-3.0.3.tar.bz2) and unpack it.
2. cd linux-3.x.x
3. modify the source (use your patch, or modify code by hand.)
4.
sed -ri 's|^(SUBLEVEL =).*|\1|' Makefile
(see PKGBUILD for linux package for additional info)
5. zcat /proc/config.gz > .config
6. make oldconfig
7. make prepare
8. make modules_prepare
9. make SUBDIRS=scripts/mod
10. make SUBDIRS=drivers/usb/core modules
At this time your module should be ready. Check it:
11. change directory to drivers/usb/core and check if usbcore.ko is there. (modinfo usbcore.ko) and gzip it
if you see "vermagic: 3.0-ARCH SMP preempt mod_unload" in modinfo's output, your module is ready to use. You can copy it to /lib/modules/3.0-ARCH/kernel/drivers/usb/core/
12. rebuild initrd (as you may need usbcore on boot)
13. reboot and PRAY

Hey I did as said here, but I don't get a usbcore.ko, only a usbcore.o ..
I also tried several other instructions, but I'm never getting the kernel module file.
Any ideas for me?

dgbaley27 · 2011-11-09 20:11:53

Kielo wrote:

Hey I did as said here, but I don't get a usbcore.ko, only a usbcore.o ..
I also tried several other instructions, but I'm never getting the kernel module file.
Any ideas for me?

# pacman -Sy linux

Kielo · 2011-11-10 04:12:52

Hm, doesn't that just install the kernel?

dgbaley27 · 2011-11-10 05:51:48

The patch has been included in the 3.2 kernel. The default Arch build has it backported for 3.1.

Kielo · 2011-11-10 06:13:51

Yeah okay, that's cool!

Problem is that I'm trying to apply the patch also on a system which is not Arch.. But I figured out that these instructions should work anyways..

dgbaley27 · 2011-11-10 06:50:23

Make sure you have the linux-headers equivalent package installed on whichever distro you choose

$ curl -O http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.1.tar.xz
$ tar -xf linux-3.1.tar.xz
$ cd linux-3.1/drivers/usb/core
$ make -C /lib/modules/$(uname -r)/build M=$PWD modules
$ gzip -9 usbcore.ko
$ sudo mkdir /lib/modules/$(uname -r)/updates # if necessary
$ sudo cp usbcore.ko.gz /lib/modules/$(uname -r)/updates
$ sudo depmod
$ #profit

The file in updates needs to be the same name as it is normally, on Arch we gzip all modules so the one in updates should also be gzipped. You can check this be running "modinfo usbcore"

Last edited by dgbaley27 (2011-11-10 06:59:06)

Kielo · 2011-11-10 12:33:36

Actually, I don't even get the usbcore.ko file. So I can't gzip it anyways..
If I compile the files in drivers/usb/core, there are some .o files including usbcore.o, but no usbcore.ko.

I'm pretty sure I've installed the header files and so on, but I will retry from scratch again.

Another thing is that there originally is NO usbcore module (and neither the core-directory in drivers/usb) , but when I download the kernel-source from the repo the directory drivers/usb/core is found, and in the Makefile usbcore.o is specified.

Maybe I'll be successful wenn I just add usbcore.ko to the fileslist in the Makefile.. I'm gonna try harder

dgbaley27 · 2011-11-10 16:18:32

It's the obj-$(CONFIG_USB) line that sets up usbcore.ko. Do those instructions work for you on Arch? Maybe there is something different about headers provided.

You could also try "make $PWD/usbcore.ko"

Last edited by dgbaley27 (2011-11-10 16:19:42)

Kielo · 2011-11-10 16:26:11

Yeah, they worked wonderful on Arch. No problems with that one

I edited obj-$(CONFIG_USB) and set usbcore.ko there.
This gave me the same output as "make $PWD/usbcore.ko" :
make: *** No rule to make target `/home/aurelin/software/linux-3.0.8/linux-3.0.0/drivers/usb/core/usbcore.ko'. Stop.

Perhaps something's different with the headers, but the instructions for Ubuntu (which is the distro I'm trying to apply the patch on) seem to be very much the same..

dgbaley27 · 2011-11-10 18:19:13

No, you definitely don't need to edit the Makefile. When you do my original instructions, do you see an error message? I can't figure out what the headers (or source) package is for Ubuntu in order to see what it actually provides.

Kielo · 2011-11-21 12:16:56

Hum, I actually gave it up for the moment.
I don't have the time, but I thought about searching the existing usb modules in Ubuntu.. Maybe there's one which has the same or similar entries, and I can just add the lines in there.
Interestingly, there are some tuts that implicate that usbcore should exist on Ubuntu. But I can't find it. Nor am I able to create it, somehow oO"

And no, there was no error when I did as you said.
It just returns
MODPOST 0 modules
And then there's no kernel module.

agapito · 2012-01-05 18:03:39

Hey guys, i recently bought this webcam (c270) but i think is broken. I opened a thread at logitech forum

http://forums.logitech.com/t5/Webcams/I … d-p/767731

I have these lines in windows and linux and i don´t know if are normal. Only when i launch my webcam with mplayer at 1280x720 resolution i don´t have these vertical lines. But all videoconferencing programs are using webcam at lower resolutions and then these lines appears. What do you think?

jose1711 · 2012-01-06 14:19:15

i have seen the same thing on my old logitech camera in linux and windows. audio works, video is this black thing. i am pretty positive it is a hardware issue.

axel · 2012-02-26 13:13:41

Can someone please confirm if this camera works without any need for kernel patch with the latest kernel at this time (3.2.7-1)?

agapito · 2012-02-26 15:27:09

Yes works. But quality could be better in skype.

Last edited by agapito (2012-02-26 15:27:56)

antouank · 2017-03-30 22:59:58

Hi there.
I'm on arch 4.10.6 and I still have this problem with C270.
It's a bit random. Some times I get the chipmunk sound, some times it works fine.
Seems like the patch for this was done years ago, how come I still have this problem!?

Any way to check what's wrong?

Xyne · 2017-03-31 00:14:42

antouank wrote:

Hi there.
I'm on arch 4.10.6 and I still have this problem with C270.
It's a bit random. Some times I get the chipmunk sound, some times it works fine.
Seems like the patch for this was done years ago, how come I still have this problem!?
Any way to check what's wrong?

The last post in this thread was over 5 years ago. Please read our policy on necrobumping and then open a new thread and provide relevant info about your specific setup.

Closing...

Arch Linux

#76 2011-11-07 21:05:47

Re: Logitech HD Webcam C270 - Chipmunk Sound

#77 2011-11-07 21:09:35

Re: Logitech HD Webcam C270 - Chipmunk Sound

#78 2011-11-08 08:11:17

Re: Logitech HD Webcam C270 - Chipmunk Sound

#79 2011-11-09 17:12:10

Re: Logitech HD Webcam C270 - Chipmunk Sound

#80 2011-11-09 20:11:53

Re: Logitech HD Webcam C270 - Chipmunk Sound

#81 2011-11-10 04:12:52

Re: Logitech HD Webcam C270 - Chipmunk Sound

#82 2011-11-10 05:51:48

Re: Logitech HD Webcam C270 - Chipmunk Sound

#83 2011-11-10 06:13:51

Re: Logitech HD Webcam C270 - Chipmunk Sound

#84 2011-11-10 06:50:23

Re: Logitech HD Webcam C270 - Chipmunk Sound

#85 2011-11-10 12:33:36

Re: Logitech HD Webcam C270 - Chipmunk Sound

#86 2011-11-10 16:18:32

Re: Logitech HD Webcam C270 - Chipmunk Sound

#87 2011-11-10 16:26:11

Re: Logitech HD Webcam C270 - Chipmunk Sound

#88 2011-11-10 18:19:13

Re: Logitech HD Webcam C270 - Chipmunk Sound

#89 2011-11-21 12:16:56

Re: Logitech HD Webcam C270 - Chipmunk Sound

#90 2012-01-05 18:03:39

Re: Logitech HD Webcam C270 - Chipmunk Sound

#91 2012-01-06 14:19:15

Re: Logitech HD Webcam C270 - Chipmunk Sound

#92 2012-02-26 13:13:41

Re: Logitech HD Webcam C270 - Chipmunk Sound

#93 2012-02-26 15:27:09

Re: Logitech HD Webcam C270 - Chipmunk Sound

#94 2017-03-30 22:59:58

Re: Logitech HD Webcam C270 - Chipmunk Sound

#95 2017-03-31 00:14:42

Re: Logitech HD Webcam C270 - Chipmunk Sound

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