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November 11th, 2025 13:20
Nvidia GPU problem
Hello I send my laptop to service for cleaning and thermal stuff but when I get back Nvidia GPU doesn't working like it only stands in Optimus mode and games starting glitching because screen mode is getting bugged. I uninstall my driver and download again but it happening again. Some guys mux switch is off that's why u can't switching screen mode but I can't find mux switch selection on bios or Alienware command center. Model is g15 5530 Rtx 4060. Please I really need some help.
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SemihYahya
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November 11th, 2025 13:20
Some guys said* sorry for misunderstand
ejn63
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November 11th, 2025 17:16
Most of these models are software controlled -- there is no MUX in the circuit.
SemihYahya
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November 11th, 2025 17:25
@ejn63 what should I do then I can't play games bc of this
ejn63
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November 11th, 2025 17:47
Exactly what isn't working? Is the nVidia GPU listed in the device manager, and is the driver loaded? If it is, it's controlled by selecting it with Optimus for the game in question.
If the driver isn't loaded or the entry in the device manager is missing, that's a question for the repair shop you employed.
Note: on these, the Intel GPU is permanently primary -- the nVidia GPU is a co-processor. All video passes through the Intel GPU on its way to the screen.
SemihYahya
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November 11th, 2025 17:49
@ejn63 so basically when I open the game is must set to Nvidia GPU screen mode but it stuck in Optimus so that's causing black screen and normally it's working but after service it crashed like that
ejn63
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November 11th, 2025 18:16
You need to find out exactly what the repairer did -- simply replacing the thermal paste should have had no effect on the GPU settings unless the job was so poor that it resulted in a rapid temperature spike.
If the GPU is working in Optimus mode, it is functioning. The rest awaits an answer from the repair shop.
UmerKhalid
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November 18th, 2025 06:03
It sounds like your GPU isn’t switching properly. Try a clean driver install using DDU and then reinstall the latest Nvidia drivers. If the MUX switch still doesn’t appear, the service center may need to recheck the GPU connection.