Let me preface this by saying that I'm mainly a windows user, and (unluckily) the first time I am running linux on hardware is my Acer A315-41 so take that as you will.
Here's what happened with me: - I initially used "pci=noacpi" to install ubuntu, and it was running as you might expect from the comments here (hang on suspend, brightness buttons not working). - After I found this page, I tried "ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2" and the performance was significantly worse - the laptop heated noticeably in idle and the battery drained really fast. I could now use the brightness keys, but the screen was stuck on max brightness and it did not change. - Finally I reverted back to "pci=noacpi", and it looks better. According to Power Statistics battery drain is about 12W in idle, and when I ran a stress test it got up to 21W so there is some kind of power management going on. The strangest thing is that even though I reverted the parameters back, I can no longer change the screen brightness at all (the default slider from power management is gone, "brightness controller" I downloaded does nothing, f.lux does not work) At this point i may reinstall ubuntu and keep it at noacpi or switch to fedora and see if it really works -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1776563 Title: Acer Aspire A315 IOAPIC failure on Ubuntu 18.04, kernel hangs, can't load, kernel freeze (AMD Ryzen 5/Radeon/Raven) / AMDGPU Hybrid crash Status in amd: Fix Released Status in Linux: Incomplete Status in linux package in Ubuntu: Triaged Status in linux-firmware package in Ubuntu: Confirmed Bug description: CPU: Ryzen 5 2500U VGA: Radeon 535 Notebook: Acer Aspire A315 This is a brand new notebook on the market with Ryzen 5/Radeon. The default kernel of Ubuntu(18.04) hangs at loading with message: tsc: Refined TSC clocksource calibration: 1996.250 MHz clocksource: tsc: mask: 0xffffffffffffffff max_cycles: (...), max_idle_ns: (...) Soft lockup Using pci=noacpi kernel parameter kernel loads without any problem but my notebook produces more heat than on Win10. If I know right Acer notebooks need ACPI to the correct power management. The same thing happens on mainline 4.17,4.18rc1-2. BIOS upgrade to the latest version: 1.08 hasn't helped This problem has been reported upstream: https://bugzilla.kernel.org/show_bug.cgi?id=200087 The latest correctly working kernel was 4.13.* but the heat problem was present with this too. To manage notifications about this bug go to: https://bugs.launchpad.net/amd/+bug/1776563/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
