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Just did a fresh install of 14.04 on AMD and its all working fine. Windows 7 done, Ubuntu 14.04 done, just need to sort out Max OS X, then Android then quad boot complete.


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I had seen the exact same situation a few days back here. Here's the complete discussion. In Short, you need to first login to the terminal mode and complete the upgrade/update process by issuing sudo dpkg --configure -a.


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I've seen cases like this where the problem was a bad RAM chip or a bad sector on the hard drive. Not enough to crash the system but enough to give the OS a hiccup. Run Memtest86 on the RAM, and if possible swap out the RAM for a friend's and see how it runs. Best to run the Memtest from a Live CD. Use a hard disk test utility from the HDD manufacturer ...


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iOn my laptop with limited disk capability, two things help. First is changing the disk scheduled from deadline (the default) to cfq. At the command line this can be done by sudo -i echo cfq > /sys/block/sda/queue/scheduler exit This should take effect immediately, and goes away on reboot. If you have more than one disk.... To make it permanent ...


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When the boot options show, edit whichever option you're selecting and remove the "quiet splash" part of the line you're on. Boot up and this should give you an indication of where you're boot is failing. As an aside, have you tried chnaging the sata mode within your BIOS?


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Minecraft freezes with on my 14.04 box. The error message reports it is a problem with compiz. I am running with the generic video driver because there is no ATI driver fix for my card. It may be worth downloading cssm and see what tweaks can be made to compiz.


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Reinstall the mouse driver : sudo apt-get --reinstall install xserver-xorg-input-mouse


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To overcome this problem, you don't necessarily need to restart lightdm. Just press ctrl + alt + F1 to go into terminal mode then, ctrl + alt + F7 to go back to regular desktop. I have the same issue with Nvidia GeForce GT 755M.


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The problem turned out to be with the kernel time processing: when I run cat /var/log/syslog | grep -i 'unstable' I see several error messages such as Clocksource tsc unstable (delta = -3474929768 ns). I solved it by turning on ACPI HPET table in BIOS. With another clocksource Linux kernel managed to handle the timers correctly.


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Apparently (I don't want to test this) GRUB2 has an option allowing the masking of bad memory cells, on a byte-by-byte basis. You will need to use the memtest boot options to determine the bad adresses, and list them in the grub configuration file as GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" using your addresses, of course. The links I ...


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Take a look at this link. This provides some pretty good instructions when your laptop freezes: What should I do when Ubuntu freezes?



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