Oracle Virtual box upgradation issue

-
I recently tried to run Xubuntu 12.04 on virtualbox 1.2.0.It was working fine.Then due to some bug in my head :) tried to upgrade virtualbox to VirtualBox-4.2.0_RC3 from here.

Now without uninstalling the previous version I installed it.It created problem.While running any Vms after installing extension pack it gave error [" failed to load vmmr0.r0 (verr_ldr_mismatch_native)"].

This issue is intially I couldn't solve.Later I solved the issue as following.
Remove virtualBox ,remove folders from Program Files then removing "C:\Users\USERNAME\AppData\Local\VirtualStore\Program Files\Oracle\VirtualBox" {Need administrative privilege}

Now install VBox freshly and import the virtual image projects/Disks.

Comments

Anonymous said…
I would like to confirm this procedure as solution for

virtualbox failed to load vmmr0.r0 (verr_ldr_mismatch_native)

for Windows Vista host of Ubuntu using Virtual Box 4.2.16, meaning remove the folder C:\Users\UserName\AppData\Local\VirtualStore\Program Files\Oracle
Wed Jul 31, 08:03:00 AM 2013
Post a Comment

Popular posts from this blog

Airtel Digital tv remote factory reset and reprogram

-
Following is the way to reset Airtel Digial tv universal remote reset procedure. 1. Press red button and ok button together untill red light blinks twice. 2. Release the buttons and press 980 buttons one by one (not together)   3. Red light will blink again two times, now press ok button. Reprogramming There are 5 basic functions which your new Airtel remote needs to learn about your TV 1. TV Power code 2. TV Mute code 3. AV code 4. TV VOL + code 5. TV VOL – code Steps for Universal remote setup: Step 1:  Bring Airtel digital TV remote in learning mode. Press and hold ‘’OK + Numeric 2” key for 3 seconds. The LED blinks twice to indicate that your Airtel remote is ready to learn. Step 2 :  Hold the source remote and Airtel remote in front of each other ( 3cm-6m apart). Step 3:  Press & release the key (First on Airtel remote and then on Source remote) which needs to be programmed in Airtel remote. Example: Press and release the TV Power key on both remotes...
Read more

Tracking Linux kworker threads

-
How to find out which part of kernel/module has created this workqueue. How to track a kworker-thread named for example ''kworker/0:3 to its origin in kernel-space? I found  this thread on lkml  that answers your question a little. (It seems even Linus himself was puzzled as to how to find out the origin of those threads.) Basically, there are two ways of doing this: $ echo workqueue:workqueue_queue_work > /sys/kernel/debug/tracing/set_event $ cat /sys/kernel/debug/tracing/trace_pipe > out.txt (wait a few secs) For this you will need  ftrace  to be compiled in your kernel, and to enable it with: mount -t debugfs nodev /sys/kernel/debug More information on the function tracer facilities of Linux is available in the  ftrace.txt documentation . This will output what threads are all doing, and is useful for tracing multiple small jobs. cat /proc/THE_OFFENDING_KWORKER/stack This will output the stack of a single thread doing a lot of work. ...
Read more

Copy_to_user or copy_from_user instead of memcpy

-
Quite the contrary, it does handle the case for swapped out memory. Lets take a look at it, shall we? copy_to/from_user boils down to __copy_user in arch/i386/lib/usercopy.c: #define __copy_user(to,from,size) \ do { \ int __d0, __d1, __d2; \ __asm__ __volatile__( \ " cmp $7,%0\n" \ " jbe 1f\n" \ " movl %1,%0\n" \ " negl %0\n" \ " andl $7,%0\n" \ " subl %0,%3\n" \ "4: rep; movsb\n" \ " movl %3,%0\n" ...
Read more