General :: Get "Unknown Device <avery Long Hex Numer Here>" And Then The Prompt "Grubrescue>"?
Jun 2, 2011
I have a laptop running windows 7 with (one hard drive with 2 partitions) and tried to create a dualboot flash win7/linux when I finished I found that I could no longer boot from the hard drive, but get "Unknown Device <avery long hex numer here>" and then the prompt "Grubrescue>"I have learned enough to at least us the "ls" command and it yeilds:(hd0) (hd0,msdos2) (hd0,msdos1) (hd31) (fd0) (fd1)Could someone comment on what this means, and what I can do to get the system booting from the HD
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Mar 11, 2010
For those that use Virtualbox on their slackware host and have a windows (xp) guest running. I have tried various settings for sound (Alsa, PulseAudio), the AC97 drivers are installed in the Windows xp guest os, but there is no sound and there is an unknown audio device (in the windows device manager). If I remove the AC97 drivers and use the soundblaster16 drivers in the Vbox settings there is no unknown sound device, but there's still no sound. why I can't get sound working?
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Nov 22, 2010
i try to install mandriva on my computer bu after the licence i gat this error message. une erreur est survenue INTERNAL ERROR: unknown device hdc
MDK::Common::Various::intenal_error()called from /urs/lib/libDrakx/devices.pm.186
Devices::entry()called from /urs/lib/libDrakx/devices.pm.201
Devices::make()called from /urs/lib/libDrakx/fsedit.pm.166
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Apr 16, 2011
I got a problem with my kernel. The initramfs source is busybox, python and gcc from ubuntu. The busybox have i compiled it self. Python and gcc is from /usr/bin. I gonna install my kernel on a i586 machine. Old yes. On the xTerm (termial) it stand "root device 8,1).
Quote:
VFS: Cannot open root device "sda1" or unknow-block(0,0) append a correct "root=" boot option; here are the available partions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)Pid: 1, comm: swapper Not tainted 2.6.38.3 #1
Call trace: This is my syslinux.cfg
default menu.c32
prompt 0
menu title BOOTLOADER
[code]....
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May 9, 2010
I'm trying to install a Linux driver for my wireless network card (D-Link DWL-G510) on my Red Hat Linux 7.1 machine with a 2.4.37.9 kernel. I downloaded the serial monkey driver from the sourceforge site and was able to successfully compile the rt73 module and load it into the kernel. The problem now is that everytime I issue the command ifconfig wlan0 up it keeps returning with the following error message: wlan0: unknown interface: No such device.
I'm at a loss as to what to do here. I specifed wlan0 as the alias for the rt73 module in the modules.conf and also tried to load the driver with the command modprobe rt73 ifname=wlan0 (this specifies the interface name according to the instructions packaged in the driver), but the error message still keeps coming up.
Is there something else I need to do in Linux to configure the wlan0 part or is the module not recognizing the wireless network card? It would be quite strange if it is the later since all information from the Internet is indicating this is the linux driver I should be using for mentioned wireless card.
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Aug 5, 2011
I am having trouble with a rather peculiar timeout during resume from suspension and I was wondering if any of you have encountered the error or might have some leads as to what causes the problem.I am using Gentoo Linux with TuxOnIce patched kernel. While both hibernation and suspension works as advertised, there is a rather irritating timeout while trying to resume from suspension. Each and every time it takes about 60s for notebook to resume back to X session again, no matter what the conditions are (i.e. USB deviced plugged in, etc.)
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Nov 14, 2010
Having some troubles mounting my DVD-RW after a reinstall of ubuntu. Now using 10.10.
Code:
root@Johnsky:/# wodim --devices
wodim: Overview of accessible drives (1 found) :
-------------------------------------------------------------------------
0 dev='/dev/scd0'rwrw-- : 'HL-DT-ST' 'DVDRAM GH20NS10'
-------------------------------------------------------------------------
So there's my scd0 sitting pretty.
Trying to mount it.
Code:
root@Johnsky:/# mount -a /dev/scd0 /media/cdrom0
mount: /dev/sr0: unknown device
root@Johnsky:/#
sr0?
Code:
root@Johnsky:/# ls -l /dev/
total 0 .....
Lets try mounting sr0 directly instead.
Code:
root@Johnsky:/# mount -a /dev/sr0 /media/cdrom0
mount: /dev/sr0: unknown device
sr0 is still an unknown device.
I'm thinking when I reinstalled Ubuntu, it made some screwy links between devices. But I have no idea how to resolve this... and there's no point in my mind to adding the DVD-RW to /etc/fstab until I can actually mount it manually to know it mounts successfully. Back when I installed Ubuntu 9.x on this machine, I never had any of these issues. It picked up the DVD-RW automatically, appended it to fstab during installation, and done. But 10.10 seems to be having some troubles my 9.x installation didn't.
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Oct 30, 2010
I had a problem with my grub (system displayed "unknown filesystem" and then the grub rescue prompt). I then used a livecd of ubuntu 9.04 and ran fsck for a while (closed it in the middle). Grub then worked. But when i select ubuntu 10.04 it goes to the purple screen and stops there. There's some error before loading the purple screen.
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Mar 10, 2010
I installed 11.1 when it first came out. The PC I used gave up the ghost and I bought a refurbie, HP xw4100 and installed the 11.1 drive in it. All works except Internet connection. I am befuddled, bemused, confused and at a complete loss! The router on USB is not detected.
Boot Time - Status blinks, LAN is OFF and remains OFF. DSL blinks several times.
Booted - Status continues and DSL blinks.
YaST (NetworkManager is useless)
Network Devices - DSL
Config Overview
- DSL Devices - Not detected
- Add - PPP over Ethernet
Mode Dependent Settings
- Ethernet Card
- DS: Connection - Unknown - No IP address assigned
- Configure Network Cards = On Hotplug
Network Settings
- Enable IPV6 (as previously set)
- DHCP Client Options - left blank
Overview
- Unknown Device
- IP Address - Not configured
- Unknown Network Device (no hwinfo)
Edit
- Dynamic Address - Zeroconf
Next
- Loop back to Overview - Unknown Device
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Apr 21, 2010
I am sharing files between three computers: ubuntu pc , windows xp pc and windows vista pc.( using samba ) Windows xp displays ubuntu pc correctly but vista does not,ubuntu pc is displayed as unknown device.Despite of this i connect vista and ubuntu via ip. I would like see my ubuntu pc in windows vista network.
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May 11, 2011
Unfortunately I've had no luck with using the default intel driver. It's strange really, you can see the gnome screen for a split second then it turns the display off like it's activating the external monitor or something. If I change the driver to vesa everything is fine.
Here is my info.
2.6.18-194.el5 i686 i386
kernel-2.6.18-194.el5
centos-release-5-5.el5.centos
00:02.0 "VGA compatible controller" "Intel Corporation" "Mobile 4 Series Chipset Integrated Graphics Controller" -r09 "Acer Incorporated [ALI]" "Unknown device 048a"
00:02.1 "Display controller" "Intel Corporation" "Mobile 4 Series Chipset Integrated Graphics Controller" -r09 "Acer Incorporated [ALI]" "Unknown device 048a"
00:02.0 0300: 8086:2a42 (rev 09)
00:02.1 0380: 8086:2a43 (rev 09)
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Apr 27, 2010
I had previously been having loads of problems getting my wireless printer to work with Linux [http://ubuntuforums.org/showthread.php?t=1453697]. Everything is working fine now. However, something that confused me is that whenever I tried to ping the printer _before_ I got it working, it would fail with a _different_ IP address. That is, the command 'ping x.y.z.3' would fail with a message saying it was unable to contact 'x.y.z.2'
Now I am looking at my router - for something unrelated - and I've noticed that rogue IP address shows up in the list of connected devices. It has a MAC address but for the device name it lists "<unknown>". Should I be concerned about this? how to figure out what this device is?
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Jan 18, 2011
I had Ubuntu installed, i installed Debian and there was no dual boot. So i formated all the hard disk to install only Debian. It installed but at boot i get error: no such device and the grub rescue> prompt. i googled for a solution and nothing worked:
- i tryed reinstalling grub, not worked
- i did the windows cd fixmbr trick, not worked
- reinstalled debian with fixmbr the first step and nothing
- tryed deleting with dd the mbr, not worked
- reinstalled grub from debian rescue, not worked
what should i do? i can't access my computer? please tell me how should i fix it? the google guys will kill me because i put their servers on fire
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Oct 12, 2010
Had a couple of problems installing Maverick from USB last night and figured I should share in case someone else finds themselves in the same situation.Hardware: HP 4510s 1.20GHz Duo CPUStart-out OS: Karmic 9.10Downloaded 32-bit ISO of Maverick 10.10Formatted USB drive to FAT32 using Gparted as Startup Disk Creator would not format it for me for some reasonRan Startup Disk Creator on formatted driveRebooted, opted to boot from USBAfter the boot menu but before being given any setup-related options from the Ubuntu installer, I got the following error: Quote:
SYSLINUX copyright info (I forget exact wording)
Unknown keyword in configuration file
boot: _
[code]...
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Jan 9, 2010
just start Ubuntu 9.04 said: File system chek failed a long is beging saved /var/long/fsck/checkfs if that location is writable Please repair the file systmen manually A maintenance shell will now be started Ctr+ D terminate this shell and resume system boot. Give root password for maintenance or type Control +D to continue. I did Ctr+D , and after login said , that can not find /home. I starte with the live cd:
[Code]....
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Dec 8, 2010
In my YaST Network Settings (11.3), I see an entry labelled "Unknown Network Device" how to remove the confusion? The Overview tab also correctly lists my three known network devices (listed below), as does the Hardware Information utility. This is the output of lspci, and as far as I can tell, is accurate and complete. So what has YaST seen that it can't identify?
Code:
00:00.0 Host bridge: Intel Corporation 82845 845 [Brookdale] Chipset Host Bridge (rev 11)
00:01.0 PCI bridge: Intel Corporation 82845 845 [Brookdale] Chipset AGP Bridge (rev 11)
00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI [Code].....
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Dec 26, 2010
Have installed ubuntu on a separate partition on single hard disk and system initially worked on a dual boot basis with windows xp. However after installing most recent series of updates computer is failing to boot.
Error message is 'error : no such device : 6937cabe-f115-455b-a248-6f8d46f80682.' prompt showing is 'grub rescue>' am now unable to access either windows or ubuntu.
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Nov 14, 2009
Currently running rc2. Downloaded 11.2 final DVD, md5sum is good, burned DVD, YaST says media check is good. (And for completeness burned a second DVD and get the same problem.)
On booting from the DVD I select "Installation" - a kernel loads and starts checking available h/w devices then crashes with the above message.
Followed by Please append a correct "root=" boot option.
Tried with root=sda1 (partition that is /) and only change is unknown-block (0,0)
My best guess is that I have EXT4 (did a clean install of RC2)? And/or I dont have a swap partition?
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May 16, 2011
I was dual-booting Ubuntu 11.04 just fine for about the last week but then ran into some issues and decided to reinstall Ubuntu. Now after the install I get this error: error: nu such device: d38af2a9-740e-4d3c-b267-2a3848e5d319 and it goes into the grub rescue command prompt screen. I have tried to reinstall Ubuntu about 6 times now, complete installs. I have tried changing boot priority multiple times. I installed off a thumb drive and left the thumb drive in after install, took it out after install.
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May 26, 2010
I have a Toshiba NB305 netbook running windows 7. I installed netbook ubuntu 10.04 from a USB drive this morning after playing with the live ISO off the USB. I chose to repartition and keep Windows 7. Upon boot, I get GRUB and when I choose either the Ubuntu or the Recovery I get a "gave up waiting for root device" page with a command prompt flashing at initiramfs.
The Alert reads, "/dev/disk/by-uuid/49024e15-119a-4339-ad23-f201ce4a6d1f does not exist. Dropping to Shell!
I'm still able to boot windows 7 as well as the live cd and see all the partitions and operating systems.
I've looked inside the Grub.cfg file and the commands aren't pointing to /dev/sda5/ but rather to the uuid? Is this normal? Does this need to be changed?
I will run this script and try and get some more info.
[url]
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Mar 19, 2010
I'm logging on my server via PuTTY but I'm getting the bash # prompt and I can't call the few commands I know i.e.: lynx
How do I get the more familiar $ prompt?
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May 5, 2010
I tried posting this before and I'm not sure what happened but I don't think it worked, so if it did please forgive the double post.am very very new to centOS and linux in general. I just want to setup a test web server that more closely mirrors our actual web server that is hosted by rackspace. I've installed centOS and tried to setup Apache, PHP and MySQL from a guide on the web using Yum. When I go to localhost in the web browser I'm able to see the default apache page. However when I create a php page it's just blank.When I look at the apache error logs I get this: PHP Warning: Unknown: failed to open stream: Permission denied in Unknown on line 0
I've been searching alot on the internet and I know the issue is permission related, but I don't know how to fix it. I've seen some forum posts that say you need to use the chmod 775 command on the /var/www/html folder.Currently when I do ls -l /var/www/html it returns
-rw------- 1 root root 19 May 5 13:16 index.php
-rw------- 1 root root 19 May 5 13:15 index.php~
I'm sure that this isn't correct but like I said I don't know much about how to set permissions or who the owner needs to be. I've done alot of searching and seen similar posts, but no one seems to explain it clearly.
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Feb 2, 2011
I'm running Red Hat Linux 5.4 on HP DL580 server with 16 processors and 64 GB of RAM. I'm connecting to the server remotely through SSH. after entering the password, it takes time to return the command line, if I click ctrl+c during this time, I'll have the command line prompt but not the correct bash prompt (I have to run bash to pass to my correct prompt).I tried to install Apache on the server, ./configure took 4 hours to finish instead of 1 or two minutes, Oracle installation same behavior. Server Disks are mirrored using RAID controller.
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Nov 5, 2010
Installed Maverick last night... the system has been working fine all day... then on a reboot tonight got the following.
RAMDISK: gzip image found at block 0
usb 1-2: new high speed usb device using ehci_hcd and address 2
uncompression error
VFS: Cannot open root device "mapper/mylaptop-root" or unknown-block(0,0)
[code]....
Then it gives the Kernel Panic
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Pid: 1, comm: swapper not tainted 2.6.35-22-generic #35-Ubuntu
Then a call trace...This is a brand new install of Maverick I copied my files onto a USB and did a fresh install on the whole drive using the alternate CD (the desktop and netbook editions both failed to read on my system) was previously using Karmic with no issues. I tried to e2fsck the dev/sda1 from the CD in "repair broken system" mode but the return was "clean" I read that as the file system being intact but this is an area that I have no real knowledge in.
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Apr 24, 2011
I am trying to install Ubuntu 10.10 from a USB flash memory stick. It works fine until around 95%, where I get the following warning/error:
[Code]....
I click OK and the installer seems to finish nicely, except the terminal throws several errors along these lines (see photo):
[Code]....
I tried also with 10.04 LTS, the difference being that the install warning appears two or three times instead of once. Some results from googling (Ubuntu Forums, Ubiquity bug) suggest unchecking the initial update options. I am going to try this but I'm not sure if I'll be able to get the boot loader right (there seemed to be problems with this).
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Aug 23, 2011
I've bought an X10 Home Automation USB interface: the CM15.
This is the information lsusb gives:
skerit@KIP-DU-SKER:~$ lsusb Bus 008 Device 002: ID 0bc7:0001 X10 Wireless Technology, Inc. ActiveHome (ACPI-compliant)
But this tells me nothing about where the device file is! How can I find that, or create one myself?
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Mar 25, 2011
How long will it take to zero fill 1TB (using dd dev/zero)?
I'm actually doing two 500G drive simultaneously if it matters.
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Feb 28, 2011
I was running grsync (rsync gui) to do a backup of my root and home partitions to a local external hdd. Home is currently 21.2 gb and root is about 60 gb, but the backup ran for nearly 24 hours before I canceled it, without finishing. How long should an 80ish gb backup take to do?
I made sure to disconnect other externals so they wouldn't be backed up as well. It was just my root and home being backed up.
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Oct 13, 2009
I am running Centos 5.3. I ran no updates, performed no installs, nor changed any configuration immediately prior to this issue. My problem is this: when I run the command startx (default runlevel 3), it is a long time (5-10 minutes) before Gnome startx, and once it does start applications will not run. Also, when I try to use sudo (from any environment, even ssh), it is a long time (5-10) before the command is executed.
I cannot say for sure, but it seems like this is an intermittent problem. Sometimes X takes a long time to start, but once it starts it will launch programs. Sometimes X takes a long time to launch, but once it starts it will only launch certain programs. Though presently X always takes a long time to start, and I cannot successfully launch any programs.
A while back a had a similar problem to this (x taking long time to start, sudo taking long time to execute) and it ended up being a DNS problem. Unfortunately, I cannot remember exactly what it was and I stupidly did not document it. Maybe this is also DNS related, I don't know.
I don't know what log files to look at for problems with X, Gnome, and sudo taking a long time to start.
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Jul 26, 2010
I'm always hesitant to use /var/tmp/, because I never quite know exactly how long the files are kept there for, or even what the directory is used for. What determines when a file gets removed from /var/tmp/, and how is the directory intended to be used?
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