General :: DMESG Does Not Display The Kernel Driver Function PRINTK Message
Apr 7, 2010
Kernel driver function was called via ioctl and returned success, but when I checked the kernel display buffer with dmesg the printk message was not there. Then when you do lsmod, the driver you were calling showed "used by zero". So it seems like the kernel driver was not accessed. In the kernel driver, I had many printk statements, but nothing printed in the buffer. if the driver get accessed and what could cause this?
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Mar 5, 2010
I've got a VPS node running 2.6.26-2-openvz-amd64 and several guest machines. My kernel keeps reporting a printk bug in syslog:
[Code].....
This is somehow being replicated on the guests machines. I've read that printk is a kernel function that prints out a message, during bootup Has anyone experienced similar problem or have a more experience with this? Does it have negative impact to the host performance?
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Feb 15, 2011
I've been getting messages, that should be in the dmesg log, on the console.This has been happening for a while, but I finally got tired of them.My system is Fedora release 14, Kernel 2.6.35.11-83 on an x86_64.When I reboot I get the following displayed with the login prompt.[ 52.492937] readahead-collector: starting delayed service auditd[ 52.795508] readahead-collector: sorting[ 53.033970] readahead-collector: finished
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Aug 12, 2010
I've got this lines in /var/log/messages Server is running varnish-cache
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Jul 8, 2010
When I run dmesg I get
Code:
[drm:drm_mode_rmfb] *ERROR* tried to remove a fb that we didn't own
Does anyone have any idea what that means?
Fedora 12 Gnome 2.28
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Apr 8, 2014
I'm trying to install Atheros AR9485 wireless card driver on debian, and I had no luck.
I followed this [URL] .... to install backports kernel version. The wireless card worked, however, intel display driver displayed the color in the wrong way.
Red pixels are green, and green are yellow. It was displayed like when someone try to connect a PAL system to a TV that supports only NTSC.
This is my lspci output:
Code: Select all00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
00:03.0 Audio device: Intel Corporation Device 0a0c (rev 09)
00:14.0 USB controller: Intel Corporation Lynx Point-LP USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation Lynx Point-LP HECI #0 (rev 04)
[Code] ....
Is there is a way to compile only AR9485 module from the kernel?
Add the following
Code: Select alli915.i915_enable_fbc=0 to your GRUB_CMDLINE_LINUX_DEFAULT= in /etc/default/grub so you would have something like that
Code: Select allGRUB_CMDLINE_LINUX_DEFAULT=" i915.i915_enable_fbc=0 nomodeset quiet splash"
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Jul 20, 2009
KMail 1.11.4, KDE 4.2.4: I'm migrating from WinXP to Mandriva, and installed KMail at the weekend. Works fine, but I have a niggle - the message list displays headers grouped by month order. I'd like the option of having a simple list (no groups), and suspect that it could be done - but I haven't been able to find out how. I've checked in the Handbook without success, and a search in LQ hasn't turned up anything yet.Any suggestions gratefully received. If this isn't the right place for a KMail query,
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Mar 8, 2011
In order to get my Wireless card working Add-on: [URL]..The wlan card is working fine except I have a huge amount of logging info in dmesg/syslog
[Code]...
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Mar 29, 2010
I am developing a function say my_abc() which does the same thing as kernel function abc(). Now I want that instead of using predefined kernel function kernel starts using my function. It might be possible that the kernel function has been used so many places.
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Apr 13, 2010
As per my knowledge, one can use systemcall to call the driver functions for example using open, close... Now is there any way to call driver functions directly from application without using system call?
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Jan 26, 2010
I manage to use the function "time" and "localtime" in gcc.But while I used it in a module in kernel space the above 2 functions are giving error.Even in kernel space time.h header file is not identified. tell the similar time function which can be used in kernel space
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May 29, 2011
I need to display a message before any login on a Linux box, either locally and for remote login via SSH. How can I achieve this? "issue" and "Banner" are the two concepts I need to use to provide a message for every user before they log into the system.
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Jan 13, 2010
I try to change locale for a program to run my native language with root. I don't know what I made, but can't open gui programs from konsole with root account.
It appear this error:
Code:
When type locale, it appear:
Code:
Yesterday I make run level 4 to skip typing startx in console, and login directly to KDE.
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Nov 30, 2010
I have OpenSuse 11.3, with KDE4. a few days ago, after an upgrade, are presenting several flaws in the system configuration.
But I think the cause of all is that at startup, before showing up loginscreen display the message box
Quote:
Could not update ICEauthority file / var / lib / gdm / .ICEautority.
I gave CRTR Alt F1 to switch to text mode, and consult the file in that directory to verify the existence of the file and its permissions:
Quote:
I've checked some forums, but apparently they relate to other scenarios that describe the solution does not work
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May 31, 2010
I want to ssh and check for a file, I hve came up with following, and its not working,
Is this possible or do I have to do this in a another way.
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Apr 16, 2010
I was trying to use Message Queues for sending message from aninserted kernel module to user space. The function sys_msgsnd failedgiving the obvious error -EFAULT.However, I was able to send the message from kernel to user space when I had made the same driver part of kernel (and not inserting it).How is that possible?I am using linux.2.6.19.x (arch=ppc)I now use Netlink socket to communicate from kernel to user, but the aboveproblem seemed strange to me.
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Aug 7, 2010
These days, I tried to compile my own kernel. Now, it seems work. However, when the kernel is booting, I always get the error message like below:
acpiphp_ibm: ibm_acpiphp_init: acpi_walk_namespace failed
It looks that something is wrong with my acpi subsystem's configuration. But no matter How I reconfig it, this message still occurs.
My distribution is UBUNTU 10.04 LTS
original kernel with the distribution is 2.6.32
My own kernel is 2.6.35
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Apr 1, 2011
I am trying to install a HP deskjet 1000-J110a. I downloaded a driver package thing, and I guess I unpacked it, and I made it, and I thought I installed it. I am totally confused and my brain hurts. The printing troubleshooter is telling me: Missing Printer Driver
Printer 'Deskjet-1000-J110-series' requires the 'foomatic-rip-hplip' program but it is not currently installed. I found something that is the 'foomatic-rip-hplip', but what the heck do I do with it?
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Jan 28, 2010
I am using GeForce 7600 GSNot using the Nvidia X driver message you know... I searched all over, and seen this problem on many searches but no resolve issues.I want to be able to connect my tv, I use to be able to when I first installed Ubuntu and now IdK.
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Aug 8, 2010
Can do nothing with the PC. New install of 10.04 and was prompted to install Nvidia driver. Did so. Rebooted, now have nothing except a thin line at top of screen. How can I remove this driver when I see nothing?
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May 20, 2010
I have been using an XFX 5770 with Windows 7 in EyeFinity and running a 5760x1080 resolution. My setup is as follows for Windows
x3 Viewsonic VA2223WM monitors (vga/dvi only)
I have two monitors connected connected with DVI and my 3rd monitor is connected with a DVI to Active Display port adapter, bizlink brand. This works wonderfully in Windows 7.
I cannot get my 3 displays to function properly in Ubuntu. I have tried removing the display port adapter and connecting my 3rd monitor with a DVI to HDMI cable and still no success. I can only use any of my 3 monitors in a dual configuration...how do I get the 3rd extended? Using the ATI driver that was auto downloaded for me...
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Sep 22, 2009
I am writing device driver in which i have to call callback function from kernel space, which are saving my data. But the callback functions are in userspace. While accessing them i am getting segmentation fault.
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Feb 21, 2010
the function terminates if no key is pressed for 10 consecutive seconds. I tried using the -t option as suggested in some forums, but my version of showkey doesn't have the option of changing the timeout. The options I get are:
-h --helpdisplay this help text
-a --asciidisplay the decimal/octal/hex values of the keys
-s --scancodesdisplay only the raw scan-codes
-k --keycodesdisplay only the interpreted keycodes (default).
Is it possible to write a script to use this function and still keep the function active until an interrupt is recieved?
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Mar 22, 2010
With Mandriva 2010 and KDE 4.3.5 it updated to kernel; 2.6.31.12-1mnb and I want to find out if it boots to this new kernel, or the previous one. In the Ubuntu gnome desktop I do know how to find that easy, so what tool or terminal command will display the current running kernel version ?
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Jul 8, 2011
where the printk messages are stored when we call a insmod? I'm using Slackware, and I think my distro can store these messages on others place.
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Mar 28, 2011
How can I troubleshoot disk with 'dmesg' cmd ? How to distinquish :
- physical disk error
- file system corruption
What is I/O Error ?
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Dec 10, 2010
What exactly is the use of dmesg?
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May 27, 2010
I want to add usb network support to a real-time Linux distribution we're using at work. USB devices are recognized, but when connecting a usb network adapter no network interface is created.
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Feb 13, 2011
I have given the task of writing a SDXC(32GB~2TB) driver for Kernel 2.6.24. I have following queries..
1> Does Linux Kernel 2.6.24 supports SDXC??? or SDHC(4GB ~ 32GB)..I know i surely supports SD...
If i need to modify the driver for SDXC what changes i need to do..Any pacthes are available?? which files need to be modified... whether driver/mmc/host/sdhci.c???
1> The SDIO host controller is implemented in FPGA in our board, & the Processor to FPGA interfacing is through PCIe.. I am not able to understand this interfacing.. what PCI related functions i need to use... I Have the Device ID & Vendor ID of Host controller...
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Jan 28, 2011
was trying to understand the messages the DMESG gives .Does any one knows how to debug the DMESG mesaage or any link for the same ?
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