Hot answers tagged

13

Switch to the console: CTRL + ALT + F1 After login, you can see which processes are running using this command: ps -ef If you see a process which has high CPU usage, you can kill it. sudo kill <pid> Of course, you can simply restart the PC too: sudo reboot


12

Well there is a magic key combination (to reboot): While holding Alt and the SysReq (Print Screen) keys, type REISUB For more details visit this answer : http://askubuntu.com/a/36717/497359


10

It seems like the problem reappeared with Chrome version 49. Below is a workaround that will solve the problem until Chrome fixes this bug. It works without disabling hardware acceleration in Chrome (and potentially causing other issues). If compizconfig-settings-manager is not installed, install it by sudo apt-get install compizconfig-settings-manager ...


9

Update of kernel to 4.4.8-wily will solve the problem. It works fine with Intel® HD Graphics 520, so I assume that it should help to all Skylake graphics cards. Instalation instructions here: http://linuxdaddy.com/blog/install-kernel-4-4-on-ubuntu/


6

Perhaps X server may choose incorrect driver for your computer. If the current version of Xorg that you use supports your computer, you need to try manually change the driver via a file, /etc/X11/xorg.conf.d/xorg.conf. This file describes Xorg server configurations. Please create the xorg.conf file with following contents. Section "Device" Identifier ...


5

Run Chrome from a terminal with the flag --disable-gpu google-chrome --disable-gpu Then select: Options - Settings - Show Advanced Settings Under the System heading, uncheck "Use hardware acceleration when available" and restart the browser.


5

This happened for me in a new install of Ubuntu 14.04. In my case, it had nothing to do with sysctl issues mentioned. Instead, the problem was that the swap partition's UUID was different during installation than it was after installation. So my swap was never enabled, and my machine would lock up after a few hours use. The solution was to check the ...


3

Yes. Look at /var/log/kern.log, and check the lines before the reboot (lines with kernel: [ 0.000000] were logged 0.000000 seconds after the reboot, so look at the lines preceding that one.


3

This may be a power management problem. Try this; At the grub menu, press E. If you grub menu doesn't appear automatically, press SHIFT when you first power on the computer. On the line that says GRUB_CMDLINE_LINUX_DEFAULT, go to the end, and right after quiet splash add radeon.runpm=0 and then press F10 to boot. If the problem is gone, you can make the ...


2

I ran into the similar issue. Mine is 64 bit Ubuntu 14.04. So After a long struggle I found a answer which solves my issue. For easy use I added the commands below used in that above mentioned answer. Check the answer for detailed explanation. echo $((16*1024*1024)) > /proc/sys/vm/dirty_background_bytes echo $((48*1024*1024)) > /proc/sys/vm/...


2

I get it occasionally in 12.04 LTS. control+ALT+t will usually open a terminal window. modprobe -r psmouse followed by modprobe psmouse will usually fix it. Check RAM by booting into GRUB. Boot holding shift down, then test memory.


2

Press Alt+PrtSc and while holding on these two keys type REISUB. for more information you can found you answer here.


2

Install the video driver by running sudo apt-get install nvidia-304 and reboot. I am suggesting 304, because I know that it works better that 340 on that card.


2

I have actually found an answer here as in fact the issue was due to having 16GB RAM installed. The writing buffer was actually too big. I have resolved by logging in as root: su root then setting the dirty bytes to a set number (I guess the default setting 0 actually doesn't give any cap to how much should the writing cache be large), by typing: echo $((...


2

The issue was kernel-related. I upgraded from the 15.10 stock 4.2 kernel to one of the mainline kernels (in my case, I'm using http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next/) and it has been running flawlessly since. I didn't find the root of the problem, but the kernel upgrade allowed me to get on with my life error-free.


2

The blinking caps lock is probably caused by a kernel panic, more info here. Look for log files as instructed here to debug this. It seems like there should be something related in /var/log/syslog.


1

Updating the kernel worked for me. I suspect the issue was graphics related because I noticed a warning during the upgrade. I followed the steps at http://sourcedigit.com/19889-how-to-update-install-linux-kernel-4-7-rc3-on-ubuntu-16-04/ to upgrade the kernel then downloaded the missing firmware. Full steps detailed below. Download the necessary files: wget ...


1

I had the same problem running Ubuntu 16.04 on the same laptop (both with and without the power connected). In desperation I updated the kernel from 4.4 to 4.5.3 (see here and here for instructions) and the problem seems to have gone - both for closing the laptop lid and selecting 'suspend' from the menu.


1

I have the similar hardware on an Acer with the same problem. It seems to be a kernal bug with intel hardware. I have a question going on Ubuntu forums(general help) dealing with this. The answers what I found so far was to use an early 3.14 kernel or to use intel_idle.max_cstate=1. I do not know yet how to do this. You can find more info at https://...


1

Try troubleshooting it with a little help from here.


1

An Atom processor? Running Ubuntu??? :O I'd start looking at Lubuntu and install that! Probably your system was just barely fitting until 14.04.4 when it started swapping like mad and that just looks like it's freezing: it's actually still working, but 1000 times slower then before... Sorry to be the harbinger of bad news... Alternatively, just get ...


1

This is fixable. On boot after BIOS screen tap SHIFT key to reach the grub screen. up / down arrow to hightlight top OS release on list (newest one) and instead of hitting Enter press E to edit. Use your arrow keys to move cursor to line which starts linux /boot put your additional kernel options at end of that line. This fix is only good for current ...


1

I had the same thing. First using LibreOffice, which i uninstalled. Then after installing Openoffice. Selecting a piece of text in order to copy it everything froze. My problem was solved by turning off "Transparency" which can be found in "Tools-Options-View". Clearly a graphical issue indeed.


1

I've seen a lot of other people who have problems with Universal USB Installer. For some reason, it just doesn't seem to like Ubuntu. Instead, since you're on Windows, use Rufus. It's portable, it's free, it's small and, most importantly, it works really well.


1

Remove the currently installed NVIDIA drivers and the xorg-edgers PPA. Open a terminal and execute : sudo apt-get purge nvidia* sudo apt-get install ppa-purge sudo ppa-purge ppa:xorg-edgers/ppa sudo reboot Install the latest stable NVIDIA drivers that support GEFORCE GTX 660M. Open a terminal and execute : sudo apt-get update sudo apt-get ...


1

First check your laptop specification. Basically there is much trouble with some hardware for you kernel. and also the performance of your integrated graphic. In case someone else finds this, a kernel upgrade fixed a similar problem. I had Ubuntu 14.04.2 kernel version 3.16.0-30, and doing a "apt -y upgrade" ended me up at kernel 3.16.0-49, and that solved ...


1

I have been suffering freezes on my Acer E5-511 ever since 15.10, and upgraded to 16.04 2 weeks ago in the hope it would go away, but the problems continued, freeze every 10-30 min max ( and usually when moving the mouse strangely!). I finally tried this 3 days ago in /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux i8042.nopnp ...


1

You could try Oracle JDK if you're using OpenJDK. I recall there was a performance difference in the Oracle JDK and the OpenJDK. I was running into performance issues in using IntelliJ, mostly being slower. That was over a year ago, not sure if the issue has been fixed today.


1

It's a confirmed bug, therefore use a newer version via the PPA ppa:wireshark-dev/stable sudo apt-add-repository ppa:wireshark-dev/stable sudo apt-get update sudo apt-get dist-upgrade



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