siyia, you have exactly the same laptop model as I have, they should work. You do something wrong. Maybe you use an incorrect grub or kernel parameter.
this a section of my /boot/grub/grub.cfg. Yours should look like this. ### BEGIN /etc/grub.d/40_custom_proxy ### menuentry "Ubuntu" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-0986d268-5f46-4555-9214-1d9dffa79286' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_gpt insmod ext2 set root='hd0,gpt2' acpi /boot/amls/ssdt10.aml acpi /boot/amls/ssdt11.aml acpi /boot/amls/ssdt13.aml acpi /boot/amls/ssdt14.aml acpi /boot/amls/ssdt1.aml acpi /boot/amls/ssdt2.aml acpi /boot/amls/ssdt3.aml acpi /boot/amls/ssdt4.aml acpi /boot/amls/ssdt5.aml acpi /boot/amls/ssdt6.aml acpi /boot/amls/ssdt8.aml acpi /boot/amls/ssdt9.aml if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2 0986d268-5f46-4555-9214-1d9dffa79286 else search --no-floppy --fs-uuid --set=root 0986d268-5f46-4555-9214-1d9dffa79286 fi linux /boot/vmlinuz-4.18.0-10-generic root=UUID=0986d268-5f46-4555-9214-1d9dffa79286 ro ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=0:00.2 quiet splash $vt_handoff initrd /boot/initrd.img-4.18.0-10-generic Additional kernel parameters aren't needed. Don't change iommu settings or anything else. Iommu should be enabled in bios menu. -- 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