General :: Embedded Stability - Unstable By Cutting Power Source Frequently And It Does Not Boot Anymore
Apr 11, 2011
I'm developing an embedded Linux (it is almost over now). What I'm struggling with is the system goes unstable by cutting power source frequently and it does not boot anymore. It even does not perform fsck. The system just has a XFCE with a fixed Qt App autoloaded to display some charts. My question is that how commercial embedded Linux distros (like Wifi AP's management Linux, ...) avoid this problem?
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Jan 16, 2010
I've been messing around with debian A LOT, getting to know it, seeing what makes it run. I recently screwed up big time and nearly rendered it unusable, but I managed to slowly repair it. However, I was unable to do any kind of auto-DHCP connections. Now when I put eth0 up, the connection will cut out after about 5 seconds, and I can't connect any more until I either restart the networking service or do ifdown then ifup.So can anyone suggest to me any logs I should look for, or any packages I should make absolutelyure I have installed and configured properly? Any config logs that need posting
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Feb 27, 2010
Judging by the number of responses (close to zero) to other threads about powertop on this forum, I have little hope in getting any answers. However, I do not know where else could I ask. PowerTop tell me that even after applying almost all the tips and tricks from lesswatts.org, my laptop still consumes over 72 Watts while idling.
Code:
< Detailed C-state information is not P-states (frequencies)
1.60 Ghz 0.0%
800 Mhz 100.0%
Wakeups-from-idle per second : 451.1 interval: 10.0s
Power usage (5 minute ACPI estimate) : 72.5 W (0.3 hours left)
Top causes for wakeups:
[Code]...
Suggestion: Enable USB autosuspend by pressing the U key or adding usbcore.autosuspend=1 to the kernel command line in the grub config This is when I am not touching the laptop. When I am surfing the web or listen to music, it goes up to 2000+ wakeups! How do I cut it further? I am getting like 20-30 minutes max on battery and this is unacceptable cause in Windows I get at least 3 times that.
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May 20, 2010
My laptop has a dead battery. Even when it's fully charged, if the power cable is pulled out it only lasts for about 4 minutes before it dies. I'm running Ubuntu Lucid Lynx 32-Bit. What I want to do is create some sort of script or program that will immediately set my computer to go into hibernation once it detects that the power cable has gone dead. I'm willing to look into all ways of doing this. I can program in C, but I'm not familiar with the API used to manage Power Management in Linux.
[Code]...
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May 13, 2011
I'm working on a project to have our company logo image display on the screen during bootup. Our platform is an embedded Linux device running on a custom configured linux kernel 2.6.38.2. Our development distro is Ubuntu 10.04. I am currently trying to get fbsplash to work on our device with no luck so far.
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Apr 6, 2010
I am using Ubuntu 9.10. Since a few days my I cannot boot anymore with the newest kernel (2.6.31-20.31). Instead I get a menu with a menu that lets me boot in recovery mode or boot from previous kernels (2.6.31-19).
In recovery mode for 2.6.31.20 it hangs at: Waiting for root file system. It boots just fine with kernel 2.6.31.19 except that apache and cups have to be reinstalled after every reboot. Everthing else seems to work without any problem.
Is there a way to do a system recovery, like in Win XP, going back to a system state from before the problems started?
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Feb 11, 2010
My Ubuntu 9.10 will not load anymore after installing the updates from the Update Manager. I get the message after restarting under the heading: [1.469482] Kernel panic- not syncing : VFS : Unable to mount root fs on unknown-block (8,2). I am very surprised that this will happen especially after installing the security updates from the Update Manager. Is there a way I can still save my Ubuntu?
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Jan 30, 2010
I'm trying to cross-compile "sudo" source for Power-PC platform using Montavista tool chain. I'm getting the following error message during configuration: checking host system type... Invalid configuration `ppc_82xx': machine `ppc_82xx' not recognized It is clear that it has found the cross-compiler and configure knows that we are cross-compiling but it fails to recognize the machine. The complete dump follows:
[vhn@localhost sudo-1.7.2p2]$ ./configure --host=ppc_82xx
configure: WARNING: If you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used.
configure: Configuring Sudo version 1.7.2p2
checking whether to lecture users the first time they run sudo... yes
checking whether sudo should log via syslog or to a file by default... syslog
[Code]...
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Aug 2, 2011
I have Linux Mint and Windows 7 installed on my laptop, and recently tried tinkering with EasyBCD, to use the Windows multi-boot loader instead of grub. Well, that didn't work out too well, because I ended up with the Windows boot loader with two options, Windows 7 and Linux Mint, however the Linux Mint entry just redirected me to grub, which wasn't what I intended.
I tried to put things the way they were, with grub as the only boot loader, and figured I'd do so by setting EasyBCD to skip the multi boot screen and going straight to the Linux Mint entry, which corresponds to grub.Well, now when I boot, I get the grub screen, but if I select the Windows 7 entry, it just redirects me back to grub, so I can't access Windows 7 right now. What can I do to fix this? Can I edit the Windows boot loader from within Linux?
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Mar 31, 2010
I've been looking around for a Linux variant which will install only the software I need rather than everything Ubuntu (for example) puts in by default. This is to create a virtual machine in Virtualbox which has bash, apache, python, perl, SQLite, openssh and a few other programs but nothing else. I'd prefer to go with Ubuntu if possible but another modern distro would do as well (I like using apt-get and yum rather than downloading/compiling etc).
SuseStudio.com, which is probably the best so far.Ubuntu 9.10, by pressing F4 to get the boot options on the install disc, but there is no minimal installation (oops! had the alternate disc instead of the server disc).Arch Linux, slightly confusing install procedure but I might go back and try again.Gentoo, started well but fairly soon the HD on the virtual machine went to 2Gb, even before the installation had started in earnest (I'd partitioned the disks is all).I realise there are various "small" Linuxes around like Puppy, Feather, DSL, etc, but they seem to be aimed at desktop users or as a techie's toolkit, and I want a small-as-possible server distro which can be managed with tools like apt or yum or similar.
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Feb 22, 2010
So 2 days ago everything was all fine on my machine. Has been for about a month, but all of a sudden as of yesterday I have no sound, I am seeing IRQ interupts on boot, During boot I am seeing file system is not clean, , and swap space is being used for the first time while doing normal task, etc. These are 2 new hard drives in RAID 1 with ReiserFS. I should have used a newer FS but thats a whole other argument.
Anyways here we go.
The system is Debian Lenny amd64
Physical RAM 4GB + 6GB swap
/var/log/messages
Code:
Feb 21 07:35:09 Sarah kernel: imklog 3.18.6, log source = /proc/kmsg started.
Feb 21 07:35:09 Sarah rsyslogd: [origin software="rsyslogd" swVersion="3.18.6" x-pid="3994" x-info="http://www.rsyslog.com"] restart
code....
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Sep 5, 2011
When i boot my PC, i get this in my Fedora 16 distro. I have tried as following but none allowing me to boot anymore.
Grub loading.Welcome to GRUB!
error: file not found. Entering rescue mode...
grub rescue>
grub rescue> ls
(hd0) (hd0,gpt3) (hd0,gpt2) (hd0,gpt1)
grub rescue> ls (hd0,gpt2)/
./ ../ lost+found/ memtest86+-4.20 grub2/ System.map-3.1.0-0.rc3.git0.0.fc16.i686 config 3.1.0.0.rc3.git0.0.fc16.i686 grub/ vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686 elf-memtest86+-4.20 initramfs-3.1.0.0.rc3.git0.0.fc16.i686.img initramfs-3.1.0.0.rc4.git0.0.fc16.i686.img System.mpa-3.1.0.0.rc3.git0.0.fc16.i686 config-3.1.0.0.rc3.git0.0.fc16.i686 vmlinuz-3.1.0.0.rc3.git0.0.fc16.i686
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Mar 15, 2010
I edited xorg.conf and changed
Code:
Option "RegistryDwords" "PowerMizerLevel=0x3"
to
Code:
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x2233; PowerMizerDefault=0x3"
which, according to this guide, should give me max powersaving on battery and adaptive clocking on AC. However, now if I unplug the AC, plug it in again, and then unplug for the second time, system freezes.
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Jan 6, 2010
I have a box running Lenny and boot with lilo. Today there was a power failure and now the system is stuck on Lilo ..It doesnt get passed that. I tried to boot in single mode but the same thing is happens. How can I fix this problem
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May 24, 2010
Does ANYONE have a stable dual boot Win7 & Ubuntu 10.04 system? I have been trying for WEEKS to get a computer configured for my student lab. I get things going and everything seems to work for a few days. And then for no reason, the next time I reboot, Grub just seems to commit suicide.
Latest example. Win 7 & Ubuntu have been co-existing perfectly fine for about a week. Iow, I do something, then reboot, and the grub menu comes up - I select something and it boots my OS of choice for that session.
But today, I've been putting the last few touches on this computer before I use Clonezilla to copy it to all of the computers in the lab. You know - hard stuff like:
* set the default profile in Windows
* install a printer in both Ubuntu & Windows
* set a background image for the logon screens that have our "don't do anything bad" policy.
how there is nothing in there that should mess w/ grub or the boot loader, right? Yet I reboot the computer, I get to where grub should load - and BARF - I get the Bios splash screen again and the computer reboots on it's own. What the !@(#$&!@#$% is going on that this keeps happening to begin with?
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Apr 19, 2011
I'm very new to Linux and recently setup a desktop PC with Puppy 5.2.5. only. I chose to have a permanent install on the hard drive and loaded additional PETS and utilities as I thought needed for my use. Last night after immediately booting up the PC I had a power cut lasting a few minutes. When power returned and I repowered the PC, I found during Puppy's boot sequence it reported an error and remained in what appeared to be a console mode - did not carry through and load my desktop. So I inserted the Puppy CD and booted from that but I'm afraid I'm not familiar enough with Linux to understand how I can get back my original desktop setup and run once again from my hard drive without having to go back to scratch.
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Apr 29, 2011
So we install Windows 7 home premium. Then in goes the Ubuntu Disk. Ubuntu seems to think that the windows 7 partition is one big lump of unallocated space. Tried multiple re-installs of Windows 7, all concluding the same. A bit of googling told me that it has something to do with partition tables or something. I even tried to use Gdisk to delete Gpt from the windows disk, which - as I have absolutely no idea what any of it means, - resulted in me screwing up the entire Win7 partition hence win7 not being able to boot anymore.
i've seen on the internet include a lot of technical garble which I don't understand. I've been using Linux for a while, but as far as partitioning and dual booting is concerned, it's always gone smoothly for me up until now
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Nov 22, 2009
Fedora 12 randomly crashes after a fresh install.Everything is left at its default during the installation except I install KDE and not Gnome.When I try to boot I hit esc at the splash screen to see where it hangs, but it never hangs at the same spot twice. Sometimes it hangs and sometimes it restarts. Its crashed everywhere from starting udev to the login screen.
I've been using kubuntu for the past year because I have the same problem with F10 and F11.
I dual boot with Windows 7 for games.
System specs:
Motherboard: MSI P45 Platinum
Processor: Intel Core 2 Duo E8500
Video Card: Radeon HD4850
Memory: 4GB (2x2GB) Patriot
HDD: Main: 250GB SATA Western Digital
code....
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Apr 19, 2010
I have a dell PE1750 server which would not boot up after a power failure. I am thrown to a shell for maintenance after showing an error in file system check. The server was running - Red Hat Enterprise Linux AS release 3 (Taroon). Please let me know if I can try to recover from this error by booting from the 1st CD of a higher version of linux like RHEL5. I ask this because I do not have the old media with which the system was setup. Can the use of latest OS CD cause any problem?
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Aug 2, 2010
I was wondering if anyone else ran into and issue with 11.3 with an IBM x3650 server using the embedded graphics card. As a reference this exact machine was working under 11.2. I am aware that there were significant changed in how video works in 11.3.
While installing and during the initial start of the operating system I can see graphical output, OPEN SUSE logo and such.
During the boot process the screen goes blank. The server is still running and I am able to ssh to the machine, but there is no access to the console.
Below is a segment of the /var/log/boot.msg that shows some errors. I can provide more logs if that would assist in tracking this down.
I did a quick google search on ES1000 and i2c and saw the same errors reported with Ubuntu version but nothing for OPENSUSE. There seemed to be a bug that was fixed in that kernel.
<6>[ 2.277737] [drm] radeon: cp idle (0x00008080)
<6>[ 2.277767] [drm] Loading R100 Microcode
<6>[ 2.277770] platform radeon_cp.0: firmware: requesting radeon/R100_cp.bin
<6>[ 2.279454] [drm] radeon: ring at 0x00000000B0000000
<6>[ 2.279476] [drm] ring test succeeded in 1 usecs
code....
This is a new install and the machine is not yet in production so I have the option to experiment with it a bit.
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Mar 14, 2011
I just installed CrunchBang Linux and it's great! But I can't boot into windows anymore. I'm sure it didn't delete my Windows partition-it's mounted. My linux partition is /dev/sda1 Windows is /dev/sda2
Code:
sudo update-grub
Found linux image: ....
Found initrd image: ....
Found linux image: ....
Found initrd image: ....
done
how I can get Windows to reappear? I've had bad luck with Grub in the past and I don't want to fight it on my own...
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Jan 19, 2011
we have new dedicated servers to run our application server oracle developer forms 6i, remember we have not install anything other the rhel 5.5 64 bits, since it is BIN files to execute from we have problem encounter, we create a new share/premia where our oracle forms 6i and report 6i BIN or say executables there, and it work fine we made setup. but while users are working every all of sudden it hang and says not responsing.
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Aug 5, 2010
experiencing a frequent crash of evolution in opensuse 11.3.It doesn't seem to be tied to any specific action.I'm using gnome interface.
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Jul 26, 2011
I'm having all kinds of stability issues running the latest version of vmware workstation on Ubuntu 11.04 64-bit. Anyone know if this is a stable config or not? If not, which version/architecture of Ubuntu is?
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Aug 4, 2010
What are some good Linux commands to make switching between different directories on the command line easier?
I often have to switch between different directories with long names, e.g.
Typically, I use tab completion, so it's something like this:
But it's annoying because all these names are so similar, so tab completion doesn't really save much work.
What tricks do you use to minimize typing in such situations?
I do use pushd and popd sometimes, but here it won't help much because I don't visit the directories in a given order.
For a nice solution, see the accepted answer to my other, related question. Basically, just create an alternative cd command:
function cd2 { select a in $1*; do cd $a; break; done }
It will list all possible completions at once:
And you can pick one by typing its number.
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Feb 4, 2011
My server is rebooting frequently(4 to 5times a day) without any logs, can any one help me out to fined the cause for the unexpected reboots of the server. reboot system boot 2.6.18-194.3.1.e Fri Feb 4 15:16 (00:-24)
[root@elastix log]# cat /etc/redhat-release
CentOS release 5.5 (Final)
[root@elastix log]# uname -a
Linux elastix 2.6.18-194.3.1.el5 #1 SMP Thu May 13 13:09:10 EDT 2010 i686 i686 i386 GNU/Linux
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Feb 4, 2011
Having enjoyed Ubuntu 10.10 for about a week parallel to Win7, I can't boot it anymore. I suppose it's because of the following: on win7 I have the Acronis Disk Director Suite (version 10.0). The Acronis OS Selector comes with it. So I thought it might be a good idea installing it before I install linux to be able to switch between the OS's afterwards. Then having ubuntu installed I ran windows and uninstalled the OS selector as I saw that ubuntu has it's own bootloader and the Acronis one didn't even run. I restarted my Laptop and win7 started automatically. No bootloader anymore. So I installed the Acronis OS Selector again and it can't even find linux (It was able to find both OS's before...) even though it shows the linux-partition (I ran the predefined installation where ubuntu partitions on its own) is still installed. So Ubuntu is still on there I just can't run it.
Where did my Ubuntu bootloader go??? (I NEED Ubuntu cuz Windows7 doesn't support my soundcard...)
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Jun 8, 2011
I had made a database in OOO Base, but I guess because of the size, it's not uncommon for it to crash. Now that testing and Sid are now using LibreOffice, is the database any more stable? Or...is there an alternative database package to be used only on a local machine without a server?
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Apr 4, 2011
I have an issue with my Dlink DWA 547 802.11n PCI adapter, I'm under LUCID fully updated.I have no trouble connecting to any wireless but after a few minutes I'm loosing the connectivity strenght (getting ping reply from my router that vary from 2ms to 200ms). But as soon as I'm rescanning the network using the command (sudo iwlist wlan0 scan) everything is fine (constant 1-2ms ping). I'm using wicd as network manager. I have tried to schedule a job in crontab to launch every 10min a network scan command, but didn't succeed to have it working, morehover I don't think that's the good way.
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Mar 1, 2011
I have run Ubuntu on my laptop for several months. The last few weeks for an unknown reason when I click on something(nothing that seems related)I start getting many notification on the bottom panel and it just continues until I shutdown my computer but pushing down the off switch, the only way to stop it.
I have tried computer janitor and only get an error message that it can't run because it thinks synaptic or another item is running when it is not. I am TOTALLY lost when it comes to fixing issues in Linux but I like it and want to keep it on my hard drive. Where to start and remember I am an idiot when it comes to Linux.
Also some program's seem to crash for no apparent reason.
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