The Ubuntu 16.04 freeze by itself especially when 2-3 instance of Pycharm is actively running.I wanted to know the exact cause of the OS freeze and found linux-crashdump.
The linux-crashdump was installed using the link [kernel-crash-dump][1]
[1]: https://help.ubuntu.com/lts/serverguide/kernel-crash-dump.html "kernel-crash-dump"
It states that after installation and rebooting the system
cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.2.0-17-server root=/dev/mapper/PreciseS-root ro
crashkernel=384M-2G:64M,2G-:128M
But cat /proc/cmdline is not showing the parameter crashkernel added to it.
I am not able to edit the /proc/cmdline in anyway.
If I add crashkernel=384M-2G:64M,2G-:128M then the error appears.
"/proc/cmdline" E667: Fsync failed
WARNING: Original file may be lost or damaged
don't quit the editor until the file is successfully written!
I am not able to move further, as per the documentation of kernel-crash-dump after the installation, I rebooted the system, but still the crashkernel parameter in the /proc/cmdline is not appearing.
I didn't get completely what the problem was but as far as I understood you had problems with crashkernel. I think that it would help if you just remove it completely and reinstall it again, because you have lost some of the files of crashkernel and that's why it's not responding. Hope it helps :)
Related
I am getting this error as:
apt-get: error while loading shared librarie: libz.so.1:cannot open shared object file: No such file or directory
When trying:
sudo apt-get zlib1g
I'm using a Ubuntu 16.04 os and i can't log into the graphic interface, after booting I can only see a blinking underscore on the top left corner of the screen, so i pressed "alt+f4" to open a terminal session.
In my commands historical I found the command:
rm -rf zlib-1.6.37
(That command was executed from the root directory of my user.) And i don't know if that is the cause.
I do need some solution to thia problem as soon as possible please.
If you need some more info just ask for it, I will reply with the answer as soon as I can.
Ok, I've figured it out, it was quite simple, but i just got desperate
The solution was just to recreate the symlink that was damaged (libz.so.1) and that fixed the problem, now I have another issue, it seems like I'm connected to network but i don't have internet at all anyway that's for another question.
Thanks if somebody tried helping me, even if the question just have like 2 hours from posted.
Alright, just a disclaimer: I've been using some version of Unix or Linux for 30 years, I have good working knowledge, but when it comes to administration I'm enthusiastically dangerous :)
Every time I do the automated OS upgrade in Pop!_OS something bad happens. And I am not talking about apt update / apt dist-upgrade. I do mean going into the settings GUI and in the last item on the list clicking "Upgrade".
Last machine I did it on failed and I couldn't recover the system, not even from a bootable stick. That machine was on it's last leg, I just let it go and built a new box, it was time. Well here we are again, time for an upgrade to 20.10.
I hit "upgrade os" (maybe it's "update os" I don't remember exactly
It did some stuff, and said it needed to restart - Okay so now we're windows? Not thrilled
Restart and end up at a gray screen where it sat at 0% progress bar for the update
I let it sit a good long while, maybe 45 minutes, I was worried this mid-low range machine was just taking a while, nothing
Cringe.. hit the reset button, the system rebooted and did "something" and then came up seemingly okay
Now here's the problem list:
Did the upgrade happen fully, completely, and successfully? How can I tell? This feels like I'm running windows and just rolling in the blind mystery..
VMWare Workstation wont launch. Nothing happens with icon click, from command line I get this error:
/usr/bin/vmware: line 105: 159580 Segmentation fault (core dumped) "$BINDIR"/vmware-modconfig --appname="VMware Workstation" --icon="vmware-workstation"
Searching online a bunch there was a lot of talk that there may be permission problems after upgrade and running it as root would help. This did not work. I read that upgrading to VMWare 16.x will help. I'm open to it, but on principle WHY does this have to be the case?
I use another app that is installed from source, it's called MakeMKV. I've had no trouble with it until the Pop upgrade. Again, it doesn't launch from the icon. I rebuilt and reinstalled it. No go. Launching from command line returns:
/snap/makemkv/217/bin/desktop-launch: line 51: /home/ritchie/.config/user-dirs.dirs: Permission denied
qt.qpa.screen: QXcbConnection: Could not connect to display :1
Could not connect to any X display.
Launching from the command line with sudo worked though! So wtf?
This feels like a key piece of the puzzle, that bit about not being able to connect to the display.
Since this post is so long I wont list the hardware, but am happy to if it helps diagnose.
Any help is appreciated!
got the same with other snap packages...
tried to figure out what's wrong...
looks like some ENV variable is not set properly causing the error:
.config/user-dirs.dirs: Permission denied
but simply reinstalling the package resolves the issue:
sudo snap remove %package%
sudo snap install %package%
I have a problem with netbeans, and i can't find a solution on google.
When i try to save a file, the pointer shows loading icon, and linux wait's indefinitely.
At this moment i can't even close netbeans, and have to run kill or pkill command.
Restarting netbeans or computer doesn't change that.
If i want to be able to save a file again, I have to kill netbeans, and remove the cache
(rm -rf ~/.cache/netbeans/8.0.2/*)
If I run strace -p , it gives me :
wait4(-1,
after removing cache and restarting netbeans, i can save file only if I don't change too much lines (about 10 lines are enough to crash netbeans again)
i have no idea about what is happening, i never had this problem before.
I think it could be a svn problem, or a disk size problem but I am absolutely not sure of that
This computer is my work computer, so i prefer not reinstall netbeans if you can help me to find out what's happening.
I am working on linux (centos 7) with netbeans 8.0.2
ps : this problem is on 1 file only, i can work fine with the rest of my project's files (of course that's the file I need right now :( )
ps2 :
I found some more details.
fuser ~/.netbeans/8.0.2/lock gave me a pid of a netbeans child process (his ppid is netbeans pid).
strace -p gives me :
futex(0xa280a0c, FUTEX_WAIT, , NULL
So it seems a thread can't release futex?
Does that seems possible to you?
If yes how can I find if it's a netbean's bug or a system problem?
So after a few days looking for a solution, i may have found what's happening.
It seems the problem doesn't come from netbeans but from centOS.
Apparently, CentOS 6.6 and 7.X have an error in the futex management (a default is missing in a switch).
https://groups.google.com/forum/#!topic/mechanical-sympathy/QbmpZxp6C64
I don't know if the person who posted this is good in system administration, but after i found this post, i have found some more saying the same thing.
I don't use the solved button right know because i'm waiting for the administrator to look at this, but I post what I found if it can help someone else.
I am a linux noob trying to setup openbox on an arch linux base. I am trying to get it as lightweight as possible in terms of resources used.
My final plan is to use openbox, with tint1 and conky.
however I am having an issue getting openbox to start. I have followed numerous guides and am struggling to figure out the problem.
I have so far installed the following (and done this config)
openbox (installed default option with the extras asked for)
create ~/.conifg/openbox
copied, rc.xml, menu.xml, autostart, environment to the above location
pyxdg
xorg-xinit
xorg-server
this didn't work so I the installed the full
xorg
still nothing, although when I try to run startx the screen goes black for a second as though it is trying, but then goes back to text mode saying it has failed.
I have had a look at the attached log file, but I don't know enough to be able to interpret it properly.
log file: https://www.dropbox.com/s/r76fowkooi822y9/Xorg.log?dl=0
I would appreciate any assistance.
Thanks
Steve
still nothing, although when I try to run startx the screen goes black for a second as though it is trying, but then goes back to text mode saying it has failed.
what is it saying?
There is only one error: (EE) open /dev/fb0: Permission denied, try starting your environment with the same configuration as root - just to see if it works. Maybe its a problem related to rootless X.
Have you configured/checked your installation (xserver, graphics driver, xinit config) using the following guides?
https://wiki.archlinux.org/index.php/xorg
https://wiki.archlinux.org/index.php/xinitrc
Try to start a minimal X (As described in the xinitrc article) to see if your xserver and graphics driver is working correctly.
Currently running: Arch linux 4.0.7-2
I've worked with X11 for a while without any trouble. Until recently after a reboot the following error came up: No screens found. I looked up similar questions but none of them had the answer required. I tried to remake my configuration file but that wasn't possible either due to Number of created screens does not match number of detected devices. Configuration failed.
I spend hours trying to find a fix but nothing worked, I tried re-installing every single package I had and removed everything to bare. Unfortunately no luck.
I then went and reinstalled entire Arch linux but to my surprise the first error to appear when trying to make a configuration file was No devices to configure. Running startx however gives me a set of floating terminals but freezes entirely.
lspci -vvv http://ix.io/juQ
/var/log/Xorg.0.log http://ix.io/juR
I'm kind of clueless right now. Any help would be much appreciated.
I think that the problem is located in that line of your log:
[ 355.070] (II) Loading /usr/lib/xorg/modules/drivers/i740_drv.so
[ 355.079] (EE) Failed to load /usr/lib/xorg/modules/drivers/i740_drv.so: /usr/lib/xorg/modules/drivers/i740_drv.so: undefined symbol: I740_Sync
It seems that this file is missing, googling a little i found that archlinux forum post, that probably will help you:
https://bbs.archlinux.org/viewtopic.php?id=176555
What you need to do, is simply run that command:
pacman -Sf `pacman -Qqet`
And maybe it solve the problem (there are no more answers to that post, so i'm not sure if it works)