My Desktop PC:   Asus P5KC Intel Q6600 2.4GHz 4Gb RAM DDR3 Geforce GT1030 Lubuntu 64bit Geforce GT1030 driver version:- 390.12   I am using the right drivers from Lubuntu but my CPU is at 80% to 100% on YT 4K video  On YouTube playing on 4K @60fps I get very high CPU load. I've tried h264ify but it's still lagging with very high CPU load. I tried different Internet browsers including Chrome, Firefox, Opera, and a patched version of Chromium, but the result is the same.  I don't have this problem with Windows 10 (64-bit). There CPU usage is 10% or 20% to 30% on YouTube 4K video and all web browsers work excellently, the only problem is memory (RAM).  So that's why I tried Lubuntu.  Any solution?
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My laptop runs Ubuntu 16.04 and has the following specs:    SSD 256  i5 7200u  8 gb RAM nvidia Nvidia GeForce GTX 950M   So ... it properly plays 30fps 4k video on YouTube, but it freezes when I try to play 60fps 4k video though there was no such an issue with it on Windows 10.  I tried different drivers ... and even different browsers ... but it still works properly only on Windows ... but I don't want to go back to Windows!  Further Info: After having a conversation with NVIDIA support - it was found out that upon YouTube 4k play - Ubuntu highly uses CPU like on this System monitor screenshot:
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chrome://gpu/     And      google-chrome --version  Google Chrome 27.0.1453.93           How To Enable WebGL In Chrome On Ubuntu ?
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This is a followup question to my  related to the Ubuntu 19.10 freeze where I had to restart the machine every time.   I looked up at my swapfile and it is of 2G size. I do have a 16G of RAM. But the memory that is being used by the swapfile is '0'. I don't understand what is going on with this.  $ swapon         NAME      TYPE SIZE USED PRIO         /swapfile file   2G   0B   -2 $ free                   total        used        free      shared  buff/cache   available     Mem:       16383568     2503164    11927228      477108     1953176    13073208     Swap:       2097148           0     2097148   The following is the image. Can some one help me with this?   Update: The following are the version of the NVIDIA driver I have.  +-----------------------------------------------------------------------------+ | NVIDIA-SMI 435.21       Driver Version: 435.21       CUDA Version: 10.1     | |-------------------------------+----------------------+----------------------+ | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC | | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. | |===============================+======================+======================| |   0  GeForce RTX 2080    Off  | 00000000:08:00.0  On |                  N/A | |  0%   49C    P8    17W / 225W |    394MiB /  7981MiB |      9%      Default | +-------------------------------+----------------------+----------------------+  +-----------------------------------------------------------------------------+ | Processes:                                                       GPU Memory | |  GPU       PID   Type   Process name                             Usage      | |=============================================================================| |    0      1045      G   /usr/lib/xorg/Xorg                            24MiB | |    0      1444      G   /usr/lib/xorg/Xorg                           101MiB | |    0      1652      G   /usr/bin/gnome-shell                         206MiB | |    0      6468      G   /usr/lib/firefox/firefox                       6MiB | +-----------------------------------------------------------------------------+   Update 2: The following are the results of systcl vm.swappiness and grep -i swap /etc/fstab  ~$ sysctl vm.swappiness     vm.swappiness = 60 ~$ grep -i swap /etc/fstab     /swapfile                                 none            swap    sw              0       0   Update 3: Added the result for ls -al /usr/share/gnome-shell/extensions  - Did not have the folder extensions under /.local/share/gnome-shell  $ ls -al /usr/share/gnome-shell/extensions total 20 drwxr-xr-x 5 root root 4096 Oct 17  2019 . drwxr-xr-x 6 root root 4096 Nov 27 09:32 .. drwxr-xr-x 2 root root 4096 Oct 17  2019 desktop-icons@csoriano drwxr-xr-x 3 root root 4096 Oct 17  2019 ubuntu-appindicators@ubuntu.com drwxr-xr-x 3 root root 4096 Oct 17  2019 ubuntu-dock@ubuntu.com   Update 3: Here I am attaching the drivers I am using for the NVidia. I have tried 435 but I kept on seeing some display issues with it. They come and go. They are something like this.    Now I tried the 430 in the drivers section. This seems to work fine so far. I have seen those out of order pixels but very rarely. What could be the reason for this? And I tried installinng the newly release 440 drivers for the nVidia but it kept on failing and therefore as a lost resort I had to move back to 430.
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I've recently done a clean install of 17.04 on a machine with an Nvidia 750Ti card and a Dell 4K monitor. I'm using the Nvidia binary driver 381.09.  All this works great apart from the fact that the display scaling I set in the Ubuntu Screen Display settings always reverts back to 1 when the machine resumes after suspend. I need to set it at 1.5 otherwise everything goes tiny (BTW why doesn't Ubuntu scale to a sensible default with 4K monitors?)  Does anyone else get this? I can't find any mention of it elsewhere.  BTW I've tried the Nouveau driver and that doesn't wake up my screen at all after suspend. So that route's a non-starter.     Edit: Looks like it's been  Will monitor to see if anything happens.
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For some reason Blender does not use my GPU when rendering, even though I have my card selected in the user preferences   When I render, my CPU usage goes up to 100% and MSI Afterburner shows no increase of GPU usage. It also doesn't show an option to change my compute device in the system area or whatever   However, when I switch to Cycles Render, it gives me the option to use my GPU, but not when I am in normal Blender Render. Is there a way to fix this or is it set like this for some reason?
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As a developer it is very common for me to have 2-3 different IDE's open, 10-15 google chrome windows which can hold up to 200 open tabs (I know I get out of hand some times), Photoshop, couple twitter bots for promo, and a few other programs but my system still runs fast and smooth.  I have an i7 processor with 12gb ram.    Now with all my usual stuff running my Physical memory is usually running around 50-60% however over the course of the day or much less even, I will gradually grow to 98%  The highest Memory usage processes will be from Google Chrome, if I sort in the task manager by highest memory usage and end the 1 highest process which will be a google chrome one, my memory usage will jump back down to about 60%.  Also by ending that 1 process, all my Chrome windows will remain open and in use, so it doesn't affect me at all by ending that process.  Based on this research I am assuming that that 1 runaway process is likely the Adobe Flash as I also can say that it gets up to the 98% much faster when I am using flash items like video or music player.  But even without using any of them it will still climb up to that high number eventually.  Has anyone else experienced similar results?
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EDIT:  I have added a new answer below for Ubuntu 20.04 LTS and CUDA 11.1.1.  See below.  I have a system with a NVIDIA card that has a compute support of 3.5+ compared on .  How do I install CUDA and the NVIDIA drivers in Ubuntu without downloading the .deb files from NVIDIA?
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What are your tips for improving overall system performance on ubuntu? Inspired by this  I realized that some default settings may be rather conservative on Ubuntu and that it's possible to tweak it with little or no risk if you wish to make it faster.  This is not meant to be application specific (e.g. make firefox load pages faster), but system wide.  Preferably 1 tip per answer, with enough detail for people to implement it.  A couple of mine would be:   Install  (via Software Center or sudo apt-get install preload); Change  value - "which controls the degree to which the kernel prefers to swap when it tries to free memory";   What are yours?  PS: Since this is not intended to have a unique answer but rather, several useful tips, I'm making this community wiki out-of-the-box.
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I know this may sound stupid, but I was having a problem with my ubuntu, it wasn't loading.   So I was googling solutions and one of them was purging something and installing something   so I did it. The proccess took a couple hours, and it didn't work. It turns out it was something to do with my graphics card (which I fixed), but when I loaded it up, I had lubuntu.   Is there any way of reverting back to ubuntu?   Or is lubuntu better to keep? I have no idea, please help.
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I have an AMD Radeon R7 M265, and when I force OPENCL with the batch file it only shows Iceland, Intel HD and the CPU.  I followed this instructions:   R, type CMD, press &#9166; Enter, go to your blender folder. ex:  cd C:\Program Files\Blender Foundation\Blender  Press &#9166; Enter and then type: set CYCLES_OPENCL_TEST=all Start Blender with blender.exe Inside blender go to File -> User preferences -> System Under compute device select OpenCL and then your card Close the preferences and go to the render panel and select device: GPU Compute.  I have the latest beta driver from AMD, but when I try to change the compute device it only shows this list:     Am I doing something wrong? Is my GPU is not supported? Or is it because it's in development and not every card is supported yet?  I've tried blender v2.74.5, v2.62, and v2.63. Every one gives the same list.
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I built a new computer and am now getting weird graphics glitches when browsing the web or streaming video in a browser.        (this one isn't mine, but similar to what is happening to me)  My setup:     (BIOS is updated with latest firmware), 16GB (2x8GB) DDR4 3200  Connected to  (old computer and HDMI cable worked fine with this TV)  I have tried many of the fixes that I found searching online, but none of them seem to completely fix the problem. I have tried fresh installs of the latest Ubuntu 18.04 and 20.04 versions. I have tried a couple methods of updating or changing the kernel versions. Changing resolutions, refresh rates, or scaling does not fix the issue.  Current configuration after fresh 20.04 install:  lsb_release -a  Distributor ID: Ubuntu Description:    Ubuntu 20.04 LTS Release:    20.04 Codename:   focal   uname -a  Linux media-server 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux   lspci | grep VGA  07:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Picasso (rev c8)   sudo lshw -c video  *-display                         description: VGA compatible controller        product: Picasso        vendor: Advanced Micro Devices, Inc. [AMD/ATI]        physical id: 0        bus info: pci@0000:07:00.0        version: c8        width: 64 bits        clock: 33MHz        capabilities: pm pciexpress msi msix vga_controller bus_master cap_list rom        configuration: driver=amdgpu latency=0        resources: irq:101 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fcb00000-fcb7ffff memory:c0000-dffff
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I never had this problem until today. When I watch a youtube video everything is fine, until I make the video fullscreen. It actually continues to play perfectly when fullscreen, but when I then exit fullscreen my sidebar and topbar are gone, and the screen is just frozen. Also my cursor is gone. It does seem to respond to ALT-F4, but it takes about 15 seconds to even close the window, and after that everything is unusable (basically frozen). What's strange though, when I re-enter fullscreen after exiting (and unity being frozen) the video plays perfectly still.   For now my workaround is opening tty1 and executing pkill -u username which logs off the user. I have looked at /var/log/syslog but it seems to be empty.  Is this freezing a common problem, if not, how can I make steps to fix this?    EDIT with specs:  I'm on a simple Samsung laptop with:  Ubuntu 14.10 64-bit,  Intel® Core™ i5-3210M,  Intel® Ivybridge Mobile (So integrated intel hd graphics 4000),  8GB ram. I don't think i've ever changed my video drivers, but it's reported as i915.  Ubuntu is up to date, and my browser is Chrome 40.0.2214.91 (64-bit). (Will test out now with firefox, but already posting this because my pc might freeze again)     EDIT 2: It doesn't freeze on Firefox. Will try reinstalling chrome now... EDIT 3: Reinstalling chrome didn't help. Will try chrome 32-bit too now...
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In the settings I can't choose another device to render other than the CPU.     According to the blender wiki the GPUs "with a GCN Architecture superior or equal to 2.0 are supported".     And as I understand my GPU (R9 270) should be supported, according to this table from wikipedia(and has GCN 2.0 and up):   Or am I wrong and my GPU isn't actually supported? :(   GPU:    R9 270 (latest drivers)  OpenCL version: 22.19  Blender version: 2.79
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watch -n 5 free -mprovides me with:  Total: 7934  Free:6233   However, my system monitor says I'm using 50-60% just while running Chrome and Spotify? To me it seems a tad high.  I'm on a desktop PC, should not have this high RAM usage. Any way to see which sucks it up?
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Many of the people have asked almost the same question.  I'm trying to render a big mesh + fur/grass file with a few characters on the screen.  when I hit render, after a number of processing, copying data to gpu etc... i get following error.  Mem: 2960.07M, Peak:2960.07M | CUDA error: Out of memory in cuMemAlloc(&amp;device_pointer, size).  I'm using Geforce GTX 690 which contains 4GB memory.   Can somebody tell me how can i get GPU rendering, while 2960M is far less then 4196M of memory.   I know somebody would suggest me to use CPU.. but i'm curios why not GPU?   I've already compressed texture, etc   Edited  I don't think any other application is using any of my 1GB remaining memory. everything is closed but blender is there, also the GPU utilities are showing 2000/2000 MB are free on one card and 1900/2000MB is free on 2nd card.    i'm using GTX 690. with two GPUs of 2GB each. If somebody thinks that one GPU should have memory matching to the cuda memory/or Peak memory then I'm doubtful. Because in preferences Blender does know that I have 2GPUs where I can select either first GPU or second GPU or even both.   When I render some of smaller objects/scenes both of my GPU renders simultaneously with two blocks.  I'm running following specs  Xeon E5-1660 0 24GB - 1600mhz GTX690
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I am using Blender 2.77 and an R7 250 GPU on Windows.  Compute Device >> OpenCL (Oland).  OpenSubdiv >> (Tested with all).  Device >> GPU Compute.
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I've already tried GPU Rendering and it seem to be twice as fast as the CPU. However I have some situation where tried to render on the GPU, but it doesn't do anything. When I switch to CPU it renders.  I have some fur texture/materials using particle systems. I wonder if that causes the GPU not to render, I'm not really sure.