Slow start-up and flickering screen

[pider]

Upgraded to 15.10 last week (not clean install), noticed at once that it is slow on start-up. I did not measure the time, but it takes longer than 15.04.

I also have a problem with flickering screen. I use Intel driver that is suggested in "additional driver"

Here is the contents of my laptop:

 13.3" Full HD LED 1920x1080 16:9 Matt IPS skjerm
6. gen Intel Core™ i7-6500U prosessor 2.5GHz ~ 3.1GHz, 2 kjerner (onboard)
8GB DDR3 1600MHz SO-DIMM RAM
256GB SSD
1TB harddisk
Intel HD Graphics 520, DirectX 12 kompatibel
Bluetooth 4.0
802.11 ac/a/b/g/n trådløst nettverkskort, Intel® Dual Band Wireless-AC 3160
10/100/1000Mpbs nettverkskort
HD Webkamera
HD Audio, stereohøyttalere
Innebygget mikrofon
1 x HDMI utgang
1 x USB 3.0 Type-C
1 x USB 3.0
1 x USB 2.0
1 x Kombinert hodetelefonutgang/mikrofoninngang
Minnekortleser for SD/MMC
Norsk tastatur med bakbelysning
Touchpad med scroll-funksjon og multitouch (multi gesture) - Forbedret utgave
Aluminium chassis
4 Cellers batteri Smart Lithium Ion, 6300mAh 45Wh
Batteritid: ca 7 timer
Full Range AC adapter 40W 100-240V 50-60Hz 19V 2.1A
Størrelse 325 x 219 x 18 mm (BxDxH)
Vekt: 1.4 kg med batteri

[Snowhog]

I would suggest you start by clearing 'all' of the system caches, both root and user, then rebooting.

[pider]

I ran this coodes and the flickering sceen is gone!

sudo sh -c 'echo 1 >/proc/sys/vm/drop_caches'
sudo sh -c 'echo 2 >/proc/sys/vm/drop_caches'
sudo sh -c 'echo 3 >/proc/sys/vm/drop_caches'

The start-up time may be a little better!

[Snowhog]

Good. The 'problem' with upgrading, is existing cache contents are retained, but system utilities/processes are new, and the two conflict. Clearing the caches often fixes these issues. At least, that's my story (and experience) and I'm sticking to it!

[pider]

Hi
I still experience flickering screen today. It seems to be the panel and Plasma flickering and the logg out - close screen.

[Guest]

I am experiencing this problem too. I have a dual intel/nvidia gpu. It happens only with the intel card. Everything is fine with the nvidia card.

[pider]

I still experience flickering screen. When I enable / dis enable the Intel driver it stops for some minutes and start flickering again.
Anyone have a solution for me?

[claydoh]

My intel systems are fine, so I can't say what works best, but check this out:
http://askubuntu.com/questions/67200...kde-plasma-5-4



Sent from my LG G4

[Guest]

Seems that the lastest kernel update fixes the problem. More testing is resquesting though