https://bugzilla.kernel.org/show_bug.cgi?id=201753 --- Comment #33 from David Coe (david.coe@xxxxxxxxxx) --- Good evening all! Herewith a summary of our various results, including my latest for the Ryzen 7 4700U (Acer Swift 3). 20 msec wait with logged retrys Ryzen Kernel Cold Warm 4700U 5.11.0-11 6 1 3500U 5.11.7 5 6 2500U 5.8.0-45 5 5.12.0 RC3 5 > 5 2400G 5.11.0-11 6 6 5.8.0-45 5 6 2200G ? >10 Two points are clear: 1. there are differences between cold and warm boot, mostly marginal but marked and very consistent with my 4700U. 2. the choice of 5 as the maximum retry number is (sorry, Suravee) unfortunate. Mostly, it guarantees that all our Ryzens just fail the IOMMU write test! Paul's experiences with the 2200G are the exception and I can appreciate his unease about just increasing the number of retrys. I'm sure he, Suravee, Alex and the AMD engineers will find an elegant solution to the problem :-). In the meantime, could you formally patch-the-patch, Suravee? I'll pass on the above data to Alex Hung, our "cherry-picker" at Ubuntu. Best regards David -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
