I'm using Ubuntu 16.04 on Dell Inspiron 5547 i7-4510U on SSD. While everything works fine on other laptops, this one is really slow. It takes around 15 seconds to lock screen, Firefox is slower than internet explorer, delayed mouse clicks, delayed actions, it takes 2 seconds to switch tab in Firefox, etc. I have no idea what's the problem, I couldn't find any drivers that could help, edited /etc/sysctl.conf :
vm.swappiness=10
vm.vfs_cache_pressure=50
but that doesn't work like i'd like to. I did clean install and it's still the same.
free -handlspci -nnk | grep -A2 VGA? Did you ever run a performance test on the SSD in case this particular one doesn't work well (hardware failure or bad system configuration)? A look into the output ofsudo dmesgmight also reveal oddities. Start looking from back to front. – David Foerster Nov 17 '16 at 12:55total used free shared buff/cache availableMem: 7,7G 3,1G 1,9G 680M 2,7G 3,6GSwap: 7,9G 109M 7,8Glspci output:
00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:0640] Kernel driver in use: i915I don't see anything wrong in dmesg. And sorry for such messy comment, formatting didn't work.
– Piotr Nov 18 '16 at 10:01{}button in the editor toolbar) will be much more readable there; alternatively you can use a pastie service for longer listings and include the link of your pastie in your question. Overall it’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks. – David Foerster Nov 18 '16 at 11:41grep MHz /proc/cpuinfo? – Doug Smythies Nov 18 '16 at 17:22