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My laptop has 2 GPUs inside:

  • AMD Mobility Radeon HD 4250
  • AMD Mobility Radeon HD 5650

After fresh installing Ubuntu 12.10, I tried installing official drivers, which broke Unity and made it unusable. I tried downgrading xorg to 1.12, installing fglrx-legacy which gave a black screen after starting Ubuntu and nothing works, including the tty. Looks like fglrx includes 5xxx drivers, fglrx-legacy 4xxx drivers and I have both cards.

Isn't there any other drivers that support both GPUs?? The laptop is really overheating (79°c) and it used to work normally in older Ubuntus. (12.04, 11.10 as I tried).

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marked as duplicate by Eric Carvalho, Radu Rădeanu, Mitch, Seth, Jorge Castro Jul 29 '13 at 23:28

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1 Answer 1

I have the same card.It seems to me that this type of configuration is not solved properly as we need to install 2 types of drivers. First of all forget about using 12.10.Whit this card it is recomended to not use above 12.04 and use fglrx legcy due to X.org incompatibility.And after this only your low performance card will work.The proprietary driver is not capable to switch between a legacy chip(4250) and a non legacy chip(5650).Atleast this is what my testing shows so far. I am going to try to install the older driver catalyst 11.5 but i have no idea why it shuld work better then my current catalyst 12.6. other possibility is to use opensource drivers + vgaswitcheroo to manually switch between them but then again the open source driver has terrible power management and the fan will run all the time with high graphics chip temperatures.please report this issue on amd site under the legacy drivers section.

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