Aside from video, the system might still be working e. The issue can occur every time you boot, only irregularly, or only under certain circumstances such as with a particular device plugged in. Symptom Variation: The bug shows up the same way, yet can be worked around by attaching an external monitor or letting the system go into standby and resume the system.
Sometimes there is screen corruption too, sometimes the screen goes black. Often, X cannot be killed from the console or if it can, it won't restart properly; only a reboot clears the state You can ping the machine and SSH into it remotely Error messages such as "GPU lockup" are sometimes present in your dmesg output Non-Symptoms X crashes and returns you to the login screen - most of the time this indicates a crash, not a freeze. It has memory structures and registers which it uses to produce graphical effects.
Don't be too disappointed if you find a weakness in your monitor, mine is probably worse than yours. The main feature is a test screen like broadcast in former days before 24 hour TV programs. It is used to test geometry and resolution of the monitor. Also included are several test screens for testing moiree effects, the horizontal and vertical screen resolution, and colour convergence.
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The tutorial was performed on a newly installed Ubuntu system but it should be applicable otherwise as well. The other day I bought an Acer Predator laptop affiliate link to test various Linux distribution. I dual booted Windows 10 with Ubuntu
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