Dell Latitude Video Issues - Intel Graphics

dell 3120 Chrome book it is (and cheap) 5 years old, 300euro new.
99% of problems on mobile devices is battery is no good.
my guess is this NOble is DESK bound CABLE lock,
sorry can NOT fix locks here, ever.
this thin note book has the big battery hidden deep inside.
and may be bad, and means it will not run on AC power pack alone.
if AC fails to run PC, we (in a shop) take the big battery out and test in AC pack, if the laptop now runs ok if yes, the battery is TOAST (they can short too)

5 years on a battery is very good., some fail at 1.(abused)
get the PC fixed in a shop
or read the service manual at dell, costs zero to read .
or sell it, and upgrade.

albrechtchri,

To resolve this issue you may want to reinstall the video card drivers into the system. This should resolve you having to change the resolution every time you start up the computer. If you need to download the drivers for your Latitude E6400 you can click the link below and choose the the video card that you have installed in your computer.

Dell Latitude E600 Driver Download Page

Thank You,
Dell-Jesse L
Dell Social Media and Communities

Your Dell Latitude E6400 laptop comes with a built-in webcam at the top of the LCD screen. This camera can take still pictures and record video for use with video messaging. You can access the camera via a software program already installed on the computer. This program can be accessed right from the desktop screen.

1.Turn on your Dell Latitude and click on the "Start" tab on the main desktop screen. A list of options will appear in a drop-down window.
2.Click "Dell Webcam" from the list of options in the window.
3.Click on "Dell Webcam Center" and the program will open. A capture window will appear on screen. Beneath the capture window will be a control panel.
4.Click on the camera icon to take a still photo.
5.Click on the "Record" button to record video with the webcam.
I hope you find it helpful. Best regards.

The Dell Latitude C600 is an older Dell laptop computer. This particular model came with Windows XP pre-installed on it. If you are experiencing problems with your computer, or you want a fresh start with your Dell, you can restore the laptop to factory settings. This process removes all of the data saved on your computer and resets all of the settings back to the way they were when you first purchased the computer.

Instructions:

Step 1
Turn off your computer if it is currently on.
Step 2
Turn on your computer. When the Dell splash screen appears, hold down "CTRL" and "F11" on your keyboard. Release both keys at the same time.
Step 3
Click "Restore" in the "Dell PC Restore by Symantec" window. Click "Confirm" when you are warned that all data will be lost.
Step 4
Allow the system to restore and wait for the message that says "The system recovery process was successful." This can take about 8 to 10 minutes.
Step 5
Click the "Finish" button and your Dell Latitude D600 is restored to factory settings.

right click on the mycomputer icon
click on properties
click on hardware , devicemanager

click on plus sign against sound, video , game controllers,and right click on the audio drivers uninstall and right click on sound , video game controllers now and click scan for hardware changes this should resolve your issue.