Specialized software that runs inside the kernel.
1
vote
1answer
83 views
Ubuntu make fails with No such file or directory /lib/modules/3.4.0/build
I am trying to build the CP210x driver for the 3.x.x kernel on ChrUbuntu.
Build instructions: Ubuntu:
make ( your cp210x driver )
cp cp210x.ko ...
0
votes
2answers
86 views
What module for network card Intel Corporation Device 1521?
I'm installing a new server and I'm not able to figure out what module should I load to make its on-board network card work. Calling lspci prints:
Ethernet controller: Intel Corporation Device 1521
...
3
votes
0answers
37 views
What kernel module function gets called, when I say “cat myfile > /dev/sda” [migrated]
I've skimmed through the Linux Kernel Module Programming guide, but can't figure out:
When I say cat image.iso > /dev/sda, will it cause the write function of file_operations structure to be ...
1
vote
1answer
30 views
How to set up a blacklist for insmod?
I want to block a certain driver module from loading in the linux kernel.
So I created a file in /etc/modprobe.d/cdc_acm.conf. In this file I added the following line:
install cdc_acm /bin/false
...
1
vote
1answer
41 views
Excluding kernel modules through /etc/modprobe.d/blacklist.conf does not work
I don't want to load the kernel module nouveau on my debian box at startup, so I put the following in /etc/modprobe.d/blacklist.conf:
blacklist ttm
blacklist drm
blacklist nouveau
I even did a ...
0
votes
0answers
37 views
I need a step by step guide to build kernel modules in ChrUbuntu
I don't have experience building kernel modules. And worse, I'm trying to do it on ChrUbuntu, so it seems that I cannot follow the existing Ubuntu guides. For example, this command fails:
# apt-get ...
5
votes
4answers
3k views
Determining cause of Linux kernel panic
I'm running an Ubuntu 12.04 derivative (amd64) and I've been having really strange issues recently. Out of the blue, seemingly, X will freeze completely for a while (1-3 minutes?) and then the system ...
0
votes
1answer
31 views
Assembly files in obj-m list when building kernel modules
I'm trying to build kexec as a module, but I'm running into a weird problem. My obj-m is:
obj-m += kexec.o machine_kexec.o relocate_kernel.o
When I run the makefile, it complains that there's "no ...
1
vote
1answer
47 views
Can kexec be built to a standalone binary, to be used where kexec was not built into the kernel?
I have remote embedded Linux devices I am trying to update to a new kernel without having to physically access. However, the command line options they boot with make one of the MTDs read only - I ...
0
votes
1answer
176 views
Reading virtual memory
Is it possible to read virtual memory even if /dev/kmem is not available? I know that I can recompile kernel to allow this file, but that's not the solution I'm looking for. Is there some tricky way I ...
1
vote
1answer
40 views
Integrating custom kernel module into Debian
I've built a kernal module from source and now would like to load the module at boot.
The .ko file is in the build directory in my user folder, and I know it works because running insmod ./vizzini.ko ...
5
votes
1answer
247 views
Loading speedstep_centrino kernel module
Because of a noisy fan in my laptop, I need to change CPU frequency and for this task I need to load the appropriate kernel module.
The CPU in my laptop Acer TravelMate 4002WLMi is:
$ cat ...
0
votes
0answers
41 views
Decreasing mouse sensitivity at kernel level
I have developed a custom-GUI Server, which runs on virtual console of Linux.For mouse-handling purpose, it reads the mouse device file
/dev/input/mice
and retrieves the event data and updates ...
1
vote
1answer
42 views
how to stop adding unused module to loadable kernel module?
Is there any way how to stop unused module to loadable kernel module other than putting them in the mod probe blacklist.
2
votes
2answers
500 views
How to disable the system beep of LMDE?
I got annoyed with the system beep of Linux Mint Debian Edition when I login or logout. I have found some solutions like:
echo "blacklist pcspkr" | sudo tee -a /etc/modprobe.d/blacklist
but it ...
1
vote
2answers
50 views
Does linux modules/drivers belong to kernal space or user space
Some articles say that modules/drivers belong to kernel space as it take part in forming the kernel; (reference: http://www.freesoftwaremagazine.com/articles/drivers_linux)
While others say that ...
3
votes
3answers
140 views
How to determine which module taints the kernel?
My kernel keeps panicking when connected to a certain wireless network. I'd like to send a bug report but my kernel is apparently tainted. From /var/log/messages:
Apr 17 21:28:22 Eiger kernel: ...
2
votes
1answer
27 views
List of packages managed by DKMS
How do I get a list of packages (and their versions) managed by DKMS so I can easily add/remove them?
2
votes
2answers
110 views
Why does modinfo say “could not find module”, yet lsmod claims the module is loaded?
According to the man page of lsmod the command shows “what kernel modules are currently loaded”.
I wrote a script that uses modinfo to show what kernel object (.ko) files are actually in use:
...
2
votes
1answer
168 views
(Solved) Linux cdc_acm device - unexpected characters sent to USB device
I'm having trouble with unexpected characters being sent on a USB port with the cdc_acm driver. What makes this all the more perplexing is that the code runs fine on Ubuntu 12.04 (3.2 kernel) but ...
0
votes
0answers
272 views
Problem with keyboard backlight in Asus N56VZ. Suspected asus-wmi problem
I use Ubuntu mainline kernel 3.8.x and 3.9.RCx on Linux Mint 14. On those kernels keyboard backlight is not working very consistently.
Sometimes kernel boots and keyboard brightness is available. ...
1
vote
2answers
234 views
Automate modprobe command at boot time on Fedora
My distribution is Fedora 17 Gnome.
Every time I reboot/restart my computer I need to run this command as root:
modprobe rt2800usb
How can I make it permanent?
2
votes
1answer
73 views
How to run Different congestion control algorithms in FEDORA 17 ..?
Earlier versions of Fedora has different loadable kernel modules which includes diffrent congestion control algorithms etc at (/lib/modules/"kernel-name"/kernel/ipv4).These are present in the form of ...
1
vote
3answers
1k views
possible to load kernel module that “disagrees about version of symbol”
I downloaded the sources for my kernel, applied a patch and rebuilt it and now I have a kernel module that, when I try to insmod, complains "Unknown symbol in module" with dmesg giving the error ...
1
vote
0answers
76 views
How to load kernel module in Chromium OS?
I've installed the Chromium Vanilla by Hexxeh to a USB drive, but I can't use it on my computer because it lacks the carl9170 driver, which is needed by my adapter (a D-Link DWA-160.)
I've managed to ...
3
votes
2answers
116 views
kernel module function call
I write a kernel module which has initialize and end function. I want one more function and want to call it from the user space process at any time i want.
Is it applicable ? If so, how ?
I am ...
2
votes
3answers
2k views
How to remove kernel module if it's still in use?
[rootSERVER ~]# rmmod -f cifs
ERROR: Removing 'cifs': Resource temporarily unavailable
[rootSERVER ~]# modprobe -r cifs
FATAL: Module cifs is in use.
[root@SERVER ~]# lsb_release -a
LSB Version: ...
5
votes
3answers
1k views
Linux Kernel logical address space organisation
According to "Write Great Code" in almost all OS run time memory is organized into following regions:
OS | Stack | Heap | Text | Static | Storage/BSS
[In increasing address fashion]
User ...
2
votes
0answers
42 views
How to configure buildroot to add a sound device?
I've used a given board configuration to reconfigure it for my individual board. My board has a CS4270 sound device of Cirrus Logic. My uImage is booting successfully on my target hardware, but an ...
2
votes
1answer
462 views
Kernel config for ASUS P8Z77-V mainboard series
I want to build a kernel (3.6 series) for a system with a ASUS P8Z77-V mainboard. Which settings fit to the built in components?
(The ideal answer would contain an example .config for this board.)
# ...
0
votes
0answers
236 views
RAID Drivers and Support for an AMD SB950 Chip?
I have an Asus Sabertooth 990FX R2 motherboard which uses the AMD SB950 chipset to create a fakeRAID array (setup for RAID 5 in my case). It is recognized as a RAID array in Windows after install of ...
3
votes
2answers
143 views
Kernel Modules: .o vs .ko
It seems that files containing kernel modules are called .o, at least that's what I figure when looking at a tutorial like this one. However, on my debian squeeze box, these files seem to be called ...
5
votes
3answers
248 views
Disadvantages of linux kernel module?
I am trying to understand the disadvantages of using Linux kernel modules. I understand the benefits of using them: the ability to dynamically insert code into a running system without having to ...
0
votes
2answers
162 views
How to load a module in Gentoo?
I am using Gentoo, with kernel 2.6.30, and I tried to load a module with modprobe usbcore, but it fails with modprobe: module 'usbcore' not found.
However, I can find a directory with that name in ...
1
vote
1answer
102 views
Compling KUTE traffic generator 1.4 on Fedora Core 5
I am trying to install KUTE traffic generator on Fedora Core 5 kernel version 2.6.15.
When I try to complile I get this error message:
[root@dhcppc128 kute-1.4]# make
make modules
make[1]: Entering ...
5
votes
2answers
230 views
What package could “linux-headers-3.7.5-1-ARCH” mean?
I'm debugging a closed-source software installer that seems to have some pre-conceived notions about my distribution. The installation aborts after not finding apt-get. The command it attempts to run ...
2
votes
0answers
799 views
WiFi not working - wlan0 FAILED
My Arch (3.6.5-1) is exhibiting a rather peculiar problem: when wifi is set up, all logs indicate that the setup was successful and that the interface is up and functional. However, when attempting to ...
4
votes
1answer
494 views
ALSA/ASoC: How to correctly load devices/drivers?
I am using Buildroot to build an embedded Linux (2.6.39.2) system for the NXP LPC3250 microcontroller.
Right now, I'm trying to get ALSA/ASoC up and running, but I'm having some issues with getting ...
2
votes
1answer
393 views
Sound not working when both the sound card and HDMI use the Intel HDA driver. How to exchange their device loading order?
I have an Acer Aspire One 522 netbook which has an Intel HDA sound card based on the Conexant CX20584 chipset. Although KDE does output sound when starting up, flash and probably many other apps which ...
1
vote
1answer
137 views
Compile Linux Kernel w/ Dynamically (Un)loadable usbserial Module
I've attempted to install drivers for an FPGA device, but require that I remove the usbserial module. This happens to be impossible because usbserial is a built-in module. It was suggested that I ...
2
votes
1answer
48 views
Standard way to expose device file to userland applications running on an unprivileged user account?
I just finished the first version of a Linux kernel module I've written in C. The module creates a device file (/dev/wn0) that controls a USB device with three LED lights. For example, running as ...
5
votes
2answers
751 views
What does mkinitrd change when it adds kernel modules to the initrd?
When creating an initrd using mkinitrd (CentOS 5.5), the kernel modules it adds to the initrd get modified in the process. For example, the initrd's /lib/sata_via.ko is not binary identical to ...
4
votes
2answers
272 views
How to debug an inserted kernel module?
I would like to debug a loaded kernel module I don't have the source code to; I suspect it's a virus. Is there a way to feed it into GDB for analysis?
4
votes
1answer
188 views
Automatically apply module patch and compile kernel when updated?
I've recently applied a one-line patch to drivers/bluetooth/btusb.c in order to enable compatibility with my Bluetooth device. However, whenever I get a kernel upgrade, the patch will be lost until ...
2
votes
1answer
260 views
Find out which modules are asociated with a usb device?
Please recommend way to figure out which driver is being used for a USB device.
Sort of a usb equivalent of lcpci -k.
1
vote
0answers
199 views
Busybox `uname -r` shows wrong kernel version
My kernel is 3.2.27 and /lib/modules/ contains 3.2.27 + folder. But when I am using
/# uname -r
3.1.9+
It's showing a strange output. My problem is that for modprobe depends on uname when I put
...
6
votes
2answers
443 views
How to block loading kernel module only in single user boot when blacklist fails?
On a "Linux debian 2.6.32-5-amd64 #1 SMP" installation where loading a kernel module (mpt2sas) is desired to be delayed to be loaded after starting sshd and users can remotely login, the mpt2sas ...
2
votes
1answer
133 views
Build kernel in one machine, install in another
I want to build my Linux kernel on my host and use it in my VWware virtual machine. They both use the same Ubuntu kernel now.
On my Host, I do make and make configure. Then, what files should I copy ...
2
votes
1answer
163 views
lsmod returns error unless called with sudo
Fixed: The install README for libusb suggests added a call to
export LD_PRELOAD=/path/to/libusb-driver.so
It was this .so file that was getting called and interefering with lsmod (and it turns ...
1
vote
1answer
62 views
What happen when we plug a device in to computer
I'm currently learning about device developement for linux, I have glaced at some books such as LLD3, .. but I still can't understand what happen when we plug a device into computer, That's my ...
