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A comment on Ditching Windows: 2 Weeks with Ubuntu Linux on the Dell XPS 13. Parent comment

Re:Ditching Windows: 2 Weeks with Ubuntu Linux on the Dell X... by majewsky on Thursday October 25, 2018 @08:29AM (#18300353)
I have two systems with AMD GPUs: a desktop with a 2015 R9 Nano and a 2018 Thinkpad with a Ryzen APU. The amdgpu driver works perfectly on both of them. The Ryzen APU has one issue where you need to set `iommu=soft` in the kernel parameters to get it to boot, but that seems to be more related to the CPU than the GPU.
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Re:Ditching Windows: 2 Weeks with Ubuntu Linux on the Dell X... by chupasaurus on Thursday October 25, 2018 @08:42AM (#18300419)
I don't have that parameter set, everything works fine. Ryzen 2400G.
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Re:Ditching Windows: 2 Weeks with Ubuntu Linux on the Dell X... by majewsky on Thursday October 25, 2018 @10:39AM (#18301213)
Maybe it's got to do with the chipset? Not sure, I don't have any other Ryzens to compare against. But `iommu=soft` is strictly required on my system, otherwise the screen just stays black after the boot manager.
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