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I've fixed it myself by using the advanced start up mode and setting the boot parameters to nomodeset withf6 + down + enter keys. That way it started up. It later became known it were errors with a Nvidia legacy card. And after installation I needed to setup the tested Nvidia legacy drivers. Else I got 4:3 screen resolution


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Could be GPU related, since both watching videos and listening to music videos (if there are a lot of animations) makes the GPU work hard, especially if the driver is not a recent one. Also sometimes, if you have a hybrid graphic adapter setup, choosing the "power save mode" should enable the "stable" adapter. But you haven't told us yet about the specs of ...


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After hours of googling, I read something similar where a complete system freeze was caused by some sort of error in the processor clock (?). I went into the BIOS and disabled the "Intel Hyperthreading Technology", and this seems to have fixed it. Although my machine now shows 8 cores, rather than 16 cores, it is no longer crashing. I can live with this, ...


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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 ...


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I would start further investigating by monitoring system resources leading up to the freeze. Basic tools like htop or top, and iotop work well. Maybe RAM or swap is filling up, or disk I/O is being held by 1 process? You can try setting the CPU affinity of your intensive process, or setting its niceness (I believe there is I/O niceness as well), to try to ...


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I also experienced a screen freeze problem similar to the one you described, after a recent upgrade from Ubuntu 12.04 to 14.04. The upgrade also led to occasional forced logout. My computer is running on an Intel i5 CPU and 4GB RAM. I used htop to investigate what processes were keeping my CPU busy. I saw a suspicious process compiz and wondered what that ...


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This is not because of Ubuntu or windows, it's because your HDD has some bad sectors, try to run a HDD test app like HDD Scan 3.3 to test it, then after you find the bad sectors use and app Like HDD Regenerator(free) to fix it. if the bad sector is unrepairable, you can try to cut the part of HDD that has it, Make it unallocated. If all the above doesn't ...


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Same happened to me on with firefox 40.0 The whole window was grey after startup, even in safe mode, all the time. The only thing which helped was pressing the (non-visible) reset and OK button after starting firefox in safe mode.


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the following three BiOS settings ( 3 CMOS settings ) fixed it for my ASUS M2N MX SE PLUS motherboard with AMD Athlon® 64-bit 2-core CPU 4200+ ( and with NViDiA GeForce 6150SE graphics chip:) ❶ CPU clock = 200 MHz "manual" ( Not "Auto"; not "Limit" ) ❷ 4 GB RAM clock = 200 MHz "manual" ( Not "Auto"; not "Limit" ) ❸ PCi express clock = 100 MHz ...


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



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