Latitude 7450 Owners' Thread

Thanks for the info. So both your displays were touchscreen? Sorry if I overlooked that in your previous posts.

Good to know. As far as the non-touch goes, the AUO is definitely more Matte than the LG.

 

Here's another thing I stumbled upon.

The AUO display (and perhaps the others) are responsive to pressure from the bezel. If you have "screen bleeding" or white patches near the edges, try relieving the pressure at nearby points on the bezel.


(Reply copy pasted so perhaps someone could see it.)

 

Hi, I have a little problem with my E7450. So basically, all of the sudden, huge lagg kicks in while in desktop. All the programs and stuff reacts + mouse cursor moves very very slow.

I have tried doing some research on currently opened programs of which would cause this, but unfortunately haven't found anything, because every click that I do, it takes at least 5-10 seconds (+ mouse cursor moves bit by bit, so not smoothly), before anything responds on windows (like the fps suddenly drops on windows to like very very low, haven't been able to run the fraps though). Memory and cpu usage isn't topped when this happens, task manager shows nothing unusual.

I have found that, just putting my laptop to sleep and then wake up from sleep, recovers it, so after that everything is just fine again.

I have tried googling the issue, but haven't found anything, every thread is about "sudden lagg in games", but mine happens in desktop (doing nothing special, just ordinary stuff).

E7450/i7-5600u/16gb/500gb samsung ssd evo running on windows 10.

Can anyone maybe please help..?

Maybe it's hardware issue, I would suspect ssd maybe, though hdtune and crystaldisk shows everything is fine.

 

If it can be fixed by a brief sleep then I would suspect software more than hardware unless there is a thermal throttling issue. What CPU speed does HWiNFO show when the computer is laggy? Is your E7450 Intel graphics or the versions with the Nvidia dGPU.

Graphics driver usually have sleep problems but in this case I wonder if it's the graphics driver is being fixed by a brief sleep. Have you gone to the Dell support site and made sure that all the drivers and BIOS are up-to-date?

John

 

Sounds like the CPU is getting stuck on a low multiplier for some reason maybe?


Sent from my iPhone using Tapatalk

 

It just happened again, so I did not manage to install HwMonitori, I had installed cpu-z though.
I noticed, that I had my laptop conf on my profile too, so it's nVidia dGPU (Dell Latitude E7450: i7-5600u, nVidia 840m, FHD, Samsung EVO 512 mSata SSD, 16GB DDR3L, 4G, 54whr)

Drivers are all up to date, I regularly keep them updated.

I post the screenshot that I managed to take. Although I would not notice anything wrong here, after sleep, these were quite the same.

I also checked event logs, but there isn't anything particularly interesting too.

 

For starters, make sure the "battery mode" is set to 'performance', and not 'power save'. If its set to power save, it will aggressive de-rate, as it appears to have done there, and performance will be extremely sluggish.

 

Battery mode is always set to balanced, I have never adjusted it to power saver mode.
Even though I will not believe that this would cause this kind of lagg..

 

Looks like you're stuck on an 8x multi=sloooow. Are you using an underpowered PSU?


Sent from my iPhone using Tapatalk

 

Something is causing the CPU to throttle. How are the temperatures (HWiNFO > Sensors will show this info)? Throttlestop might also give some clues.

Whatever it is shouldn't be happening. Even 800MHz should not be severely laggy unless something is hogging all the system resources (which should be revealed by Task Manager).

John