Laptop HP DV9235nr boots up OK and works for 5 minute and than system hangup.
I'm not familiar with Ubuntu. But, this post
Prevent Computer Crash Using Best Computer Performance Test Software may help. Follow the process to diagnose your computer performance, and there are some suggestions for the best computer performance test software that is available for Ubuntu. Chek it out. Good luck!
The issue might be due hardware malfunction or lack of system performance or corrupt os.
perform hard drive self test:
Hard Drive Self Test:
1. If the notebook computer is running solely on battery power, plug the AC adapter into the notebook.
2. Shut down the computer if it is running.
3. Press the power button to turn on the computer.
4. Press f10 when the HP/Compaq logo displays.
5. After the BIOS Setup Utility displays, use the Right Arrow key to select the Diagnostics menu.
6. Select HDD Self-Test options .
7. Press enter to display a list of HDD/Self-Test options.
8. Select Notebook Hard Drive and then press f10 to display an Estimated test time .
9. Press f10 to continue. The Hard Drive Self Test executes a Quick test , a Comprehensive test, and a SMART test.
If test pass then perform below steps:
Improve system performance:
Follow the steps provided in the below url:
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00815926
if persists, restore the ntoebook to factory settings.following below steps in the url
http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&dlc=en&cc=us&docname=c00809678&product=18703:
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