webcam oops

First, write a personal favorite debugging skills.1. Open Config_debug_kernel in Menuconfig2. objdump-d-S (uppercase) *.O > file can get mixed C and assembly codeOr make *.lst can get it.3. Addr2line-f-E vmlinux address (0xcxxxxxxxx) to get the address corresponding to the function name and the number of rows in the file4. Based on oops information, view the value of R13 (SP), R14 (LR), R15 (PC) register, ARM architecture? printk? Debug support in the

and investigate the logical cause of the deadlock.-Deadlocks that do not involve interrupt contexts. In this case the deadlock, the interrupts on each CPU are normal, the system can respond to the ping request, then NMI watchdog cannot be triggered. In the kernel before 2.6.16, there is no good way to deal with this situation. In the RHEL5, RHEL6 kernel, a watchdog kernel thread is provided on each CPU, and in the event of deadlock, the watchdog kernel thread on the deadlock CPU cannot be dispa

Kernel-State Call TraceThere are three types of error in the kernel state, namely bug, oops and panic.A bug is a minor error, such as a call to sleep during spin_lock, causing a potential deadlock problem, and so on.Oops represents a user process error and needs to kill the user process. At this point, if the user process takes up some signal locks, these signal locks will never be released, resulting in system potential instability. Note that

Baizu: objdump-D *. O to get the disassembly code. Objdump-S *. O is compiled with C source code, which requires that the previous compilation contains debug information (-g ). //////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////// Oops: 0000 [#1] preempt SMPModules linked in: capidrv kernelcapi ISDN slhc IPv6Loop dm_multipath snd_ens1371 gameport snd_rawmidi snd_ac97_codecAc97_bus snd_se

| second commit (tag: v1) [mecury]* 46de4a5 2016-04-04 | First Commit (tag: v1-beta) [mecury] Reset Branch:First, mark the branch But before we remove the submission, let's use a tag to mark the latest submission so that we can find it again. $ git tag oopsReset to Oops Looking at the log history above, we will know that the submission marked as "v1" is correct before the error submission. Let's reset the branch to this location. Because the Branch

[Cpp]# Include # Include # Include # Define BUFFERSIZE 4096# Define COPYMODE 0644Void oops (char *, char *);Int main (int argc, char * argv []){Int in_fd, out_fd, n_chars;Char buf [BUFFERSIZE];If (argc! = 3){Fprintf (stderr, "Usage: % s source destination \ n", * argv );Exit (1 );}If (in_fd = open (argv [1], O_RDONLY) =-1)Oops ("Cannot open", argv [1]);If (out_fd = creat (argv [2], COPYMODE) =-1)

1. Modify/etc/vsftpd. confSetListen = YESChangeListen = NOStep 2: Add a file:/etc/xinetd. d/vsftpdThe content is as follows:Service vsftpd{Disable = noSocket_type = streamWait = noUser = rootServer =/usr/sbin/vsftpdPort = 21Log_on_success + = PID HOST DURATIONLog_on_failure + = HOST}Step3. restart xinetd[Root @ home vsftpd] #/sbin/service xinetd restartStopping xinetd: OK]Starting xinetd: OK]3. Common ErrorsFtp client connection failuresSymptom 0:> Ftp: connect: the connection is rejected.Cause

object is created. Next, add two properties price and rating a getInfo() method. Because prototype it contains an object, you can add it like this:Gadget.prototype.price = 100;Gadget.prototype.rating = 3;Gadget.prototype.getInfo = function(){ return ‘Rating: ‘ + this.rating + ‘, Price: ‘ + this.price;};You can also achieve the same goal in another way by completely overwriting the prototype attribute and replacing it with the object of your choice:Gadget.prototype = { price: 100, ratin

Motion (http://www.lavrsen.dk/foswiki/bin/view/Motion/) is a small, lightweight but powerful application software that can be used to manipulate security cameras on Linux. It works in concert with any Linux-enabled camera, including all v4l webcams, many IP cameras, and NCR (Axis) cameras, which also control panning and tilt functions. Motion can record videos and snapshots in formats such as JPEG, PPM, and MPEG, which you can view remotely in a Web browser, thanks to Motion's built-in HTTP serv

X1 Devmodesnaptest-app 1 x3 devmodeubuntu-calculator-app 2.1+snap3 5 Ubuntucoredev -ubuntu-core 16.04+20160531.11-56 122 canonical -webcam-webui 1 X1 -Above, we see that the Ubuntu-calculator-app application has been installed. We can delete it by using the following method.[Email protec

drivers is SCSI, USB, and FireWire. Some drivers may is more difficult to find. For instance, joystick drivers is not in a joystick folder. Instead, they is under./drivers/input/joystick. Keyboard and mouse drivers is also located in the input folder. The Macintosh folder contains code for hardware made by Apple. The Xen folder contains code for the Xen hypervisor. A hypervisor is software or hardware this allows users to run multiple operating systems on a single computer. This means, the Xen

informational prompt that includes some of the default items. At the bottom, there is an IP network camera, the "IP network Camera" entry. Step 4th-Access your IP webcam in the Internet After the router's port forwarding is configured, we can access the network camera over the network. It is recommended that you try to access your webcam at a remote location, not just to verify that the port is forwardin

Using a null pointer and buffer overflow is the two most common cause of oops.1, the direct view oops information, first find the source code occurs oops location, by viewing the instruction register EIP value, you can find the location. Then find the function call stack to get more information. Local variables, global variables, and function parameters can be di

through the syslogd daemon, KLOGD programs can be either from/proc/kmsg files or via syslog () The system calls to read these messages, by default, it chooses to read the/PROC implementation, either way, KLOGD will block until a new kernel message is available for reading. After being awakened, it reads out the new kernel message and processes it, by default it passes the message to the SYSLOGD daemon. 18.3.5 conversion from printf () to PRINTK () 18.4

Camera in the computer application is very extensive, we can use the camera to take pictures, but also through the camera with friends and relatives to see each other, greatly facilitate our network life. But in the use of the camera will also encounter a variety of problems, the following summary of the author of a variety of cameras can not use the fault and solutions, I hope to encounter similar problems of friends have a reference. 　What about the camera's black screen How can a lapto

= "oops, global" ; // ' a ' also property On global Objectbar (); // "oops, global" On the surface, bar is pointed to the Foo function through the foo attribute of obj, in fact, bar is a reference directly to Foo, because Foo in obj is also referred to by Foo. At this point, because this loses the binding, the default binding takes effect. function foo () { console.log (this . a);} function d

and r/log/messages. Can be re-specified through the configuration fileWhen you start KLOGD, you can change the record level of the terminal by specifying the-C flag.18.3.5 from printf () to the PRINTK () the conversion18.4　oopsOops is the kernel that informs the user that there is no way God is most commonly used.Readers who use the PC may be amazed at the number of registers (there are 32 of them). You might be more familiar with the x86-32 system, where o