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Prizonte
Paper Tape
Posts: 3
Registered: ‎08-18-2019
Location: US
Views: 191
Message 1 of 5

P52 Lag on external monitor

I set my external monitor as my main display and use the hybrid graphics option. I will get lag spikes when using firefox, transitioning between programs, etc. I looked at this link and saw that it's an issue with using hybrid graphics. Is there any way to fix the lag when using hybrid graphics?

bobbie424242
802.11n
Posts: 49
Registered: ‎12-20-2018
Location: FR
Views: 129
Message 2 of 5

Re: P52 Lag on external monitor

When your external monitor is displaying, try killing dwm.exe.

Lenovo ThinkPad P72 - i7-8850H / 16GB DDR4-2400 / 1TB Samsung 970 Evo / 1TB HDD / 17.3" UHD / Intel UHD 630 / Quadro P600 / 99W Battery / Linux distro: openSUSE Tumbleweed
Prizonte
Paper Tape
Posts: 3
Registered: ‎08-18-2019
Location: US
Views: 127
Message 3 of 5

Re: P52 Lag on external monitor

I've tried that a couple times before but I still get lag spikes afterwards. Thanks for the help though. I might just run it in discrete mode whenever I plug in a monitor for now unless a more permanent solution comes up

bobbie424242
802.11n
Posts: 49
Registered: ‎12-20-2018
Location: FR
Views: 123
Message 4 of 5

Re: P52 Lag on external monitor

Yup, this issue is caused by Optimus and the exact cause is unknown: could be Windows, Intel or NVIDIA drivers.

I vaguely remember someone mentioning that the issue went away after disabling Windows fast boot or something similar (eg having Windows do a full slow boot). Might be worth trying.

Lenovo ThinkPad P72 - i7-8850H / 16GB DDR4-2400 / 1TB Samsung 970 Evo / 1TB HDD / 17.3" UHD / Intel UHD 630 / Quadro P600 / 99W Battery / Linux distro: openSUSE Tumbleweed
Prizonte
Paper Tape
Posts: 3
Registered: ‎08-18-2019
Location: US
Views: 116
Message 5 of 5

Re: P52 Lag on external monitor

I disabled fast boot after I reinstalled Windows when I first got my laptop. Might just get an iGPU only device next time and hook up an eGPU when needed. Thanks

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