I have an hp pavillion notebook, Amd A9-9410 radeon R5 cpu, amd radeon r7 M440 graphics card. I 'v burned the iso into a usb stick using rufus. After I boot and click try ubuntu or install it starts normally and after a minute everything freezes and have to shut down. I added the acpi=off parameter and i was able to install ubuntu but after I couldn't even get to the login screen. It either gave me a black screen with hundreds of "amd-vi completion-wait loop timed out" errors or tells me to fsck the sda7 partition which I do manually and then again nothing. I even tried opening with the acpi=off and other tricks I've found over the forums but nothing worked.
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To get useful help, please edit your question to describe in detail all those tricks you have tried. Otherwise, those will be the first solutions we recommend.– user535733Sep 27, 2018 at 22:24
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By tricks i mean changing the bios settings with legacy boot and security boot plus trying nomodeset and iommu=soft commands.– z3y50nSep 29, 2018 at 10:03
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