Today I have installed Ubuntu Jammy Jellyfish (release 22.04) on Acer Aspire One (A114-32-P991), but the i801 SMBus interrupt storm made this system unusable.
Operating system version.
$ lsb_release -a
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Jammy Jellyfish (development branch) Release: 22.04 Codename: jammy
Kernel version and architecture.
$ uname -a
Linux laptop 5.15.0-25-generic #25-Ubuntu SMP Wed Mar 30 15:54:22 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
The issue is apparent through constant operating system freezes due to CPU soft lockups.
Apr 17 20:15:16 laptop kernel: [ 1732.712998] watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [swapper/3:0]
These lockups are caused by the unusually high number of i801_smbus interrupts.
$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 0: 12 0 0 0 IR-IO-APIC 2-edge timer 1: 0 0 114 0 IR-IO-APIC 1-edge i8042 8: 0 0 0 1 IR-IO-APIC 8-fasteoi rtc0 9: 0 35 0 0 IR-IO-APIC 9-fasteoi acpi 14: 0 2 0 0 IR-IO-APIC 14-fasteoi INT3453:00, INT3453:01, INT3453:03 15: 0 0 0 0 IR-IO-APIC 15-fasteoi INT3453:02 20: 0 0 0 2937054 IR-IO-APIC 20-fasteoi i801_smbus 31: 911 0 0 0 IR-IO-APIC 31-fasteoi idma64.0, i2c_designware.0 39: 0 0 5148 0 IR-IO-APIC 39-fasteoi mmc0 120: 0 0 0 0 DMAR-MSI 0-edge dmar0 121: 0 0 0 0 DMAR-MSI 1-edge dmar1 122: 0 0 0 0 IR-PCI-MSI 311296-edge PCIe PME 123: 0 0 0 0 IR-PCI-MSI 315392-edge PCIe PME 124: 0 0 0 0 IR-PCI-MSI 317440-edge PCIe PME 125: 0 0 0 3 IR-PCI-MSI 1048576-edge rtsx_pci 126: 2143 0 0 0 IR-PCI-MSI 344064-edge xhci_hcd 128: 0 0 0 0 IR-PCI-MSI 294912-edge ahci[0000:00:12.0] 129: 0 1 0 0 IR-PCI-MSI 1050624-edge enp2s0f1 130: 0 102 0 0 IR-PCI-MSI 32768-edge i915 131: 0 0 36 0 IR-PCI-MSI 245760-edge mei_me 132: 0 0 0 29 IR-PCI-MSI 1572864-edge ath10k_pci 133: 419 0 0 0 IR-PCI-MSI 229376-edge snd_hda_intel:card0 NMI: 4 9 1 0 Non-maskable interrupts LOC: 10190 5306 10085 9476 Local timer interrupts SPU: 0 0 0 0 Spurious interrupts PMI: 4 9 1 0 Performance monitoring interrupts IWI: 8 19 0 0 IRQ work interrupts RTR: 0 0 0 0 APIC ICR read retries RES: 1095 1011 1710 1309 Rescheduling interrupts CAL: 6118 9384 7753 5489 Function call interrupts TLB: 0 6 3 1 TLB shootdowns TRM: 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 Threshold APIC interrupts DFR: 0 0 0 0 Deferred Error APIC interrupts MCE: 0 0 0 0 Machine check exceptions MCP: 1 2 2 2 Machine check polls ERR: 0 MIS: 0 PIN: 0 0 0 0 Posted-interrupt notification event NPI: 0 0 0 0 Nested posted-interrupt event PIW: 0 0 0 0 Posted-interrupt wakeup event
Temporary solution is described at Soft lockup due to interrupt storm from smbus.
Inspect i2c-i801 module parameters.
$ modinfo --parameters i2c-i801
disable_features:Disable selected driver features: 0x01 disable SMBus PEC 0x02 disable the block buffer 0x08 disable the I2C block read functionality 0x10 don't use interrupts 0x20 disable SMBus Host Notify (uint)
You can stop using interrupts for this module by defining modprobe configuration, but this was too late for me as I couldn’t decrypt system disk to read this at boot.
$ cat <<EOF | sudo tee /etc/modprobe.d/i2c-i801.conf options i2c-i801 disable_features=0x10 EOF
The better solution is to alter default GRUB configuration.
$ cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_TIMEOUT_STYLE=hidden GRUB_TIMEOUT=0 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="i2c-i801.disable_features=0x10 quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1"
Update GRUB configuration.
$ sudo update-grub
Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.15.0-25-generic Found initrd image: /boot/initrd.img-5.15.0-25-generic Memtest86+ needs a 16-bit boot, that is not available on EFI, exiting Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done
Reboot operating system.
$ sudo reboot
Everything should work as expected as there is no interrupt storm.
$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 0: 12 0 0 0 IR-IO-APIC 2-edge timer 1: 0 0 4805 0 IR-IO-APIC 1-edge i8042 8: 0 0 0 1 IR-IO-APIC 8-fasteoi rtc0 9: 0 1652 0 0 IR-IO-APIC 9-fasteoi acpi 14: 0 183955 0 0 IR-IO-APIC 14-fasteoi INT3453:00, INT3453:01, INT3453:03 15: 0 0 0 0 IR-IO-APIC 15-fasteoi INT3453:02 31: 2248499 0 0 0 IR-IO-APIC 31-fasteoi idma64.0, i2c_designware.0 39: 0 0 363801 0 IR-IO-APIC 39-fasteoi mmc0 120: 0 0 0 0 DMAR-MSI 0-edge dmar0 121: 0 0 0 0 DMAR-MSI 1-edge dmar1 122: 0 0 0 0 IR-PCI-MSI 311296-edge PCIe PME 123: 0 0 0 0 IR-PCI-MSI 315392-edge PCIe PME 124: 0 0 0 0 IR-PCI-MSI 317440-edge PCIe PME 125: 0 0 0 3 IR-PCI-MSI 1048576-edge rtsx_pci 126: 0 4875 0 0 IR-PCI-MSI 344064-edge xhci_hcd 127: 0 183174 0 0 INT3453:00 18 ELAN0503:00 128: 0 0 0 0 IR-PCI-MSI 294912-edge ahci[0000:00:12.0] 129: 0 0 0 0 IR-PCI-MSI 1050624-edge enp2s0f1 130: 487 0 987502 0 IR-PCI-MSI 32768-edge i915 131: 0 38 0 0 IR-PCI-MSI 245760-edge mei_me 132: 0 78403 500 0 IR-PCI-MSI 1572864-edge ath10k_pci 133: 0 0 0 1767 IR-PCI-MSI 229376-edge snd_hda_intel:card0 NMI: 103 111 115 107 Non-maskable interrupts LOC: 740998 739429 839688 708769 Local timer interrupts SPU: 0 0 0 0 Spurious interrupts PMI: 103 111 115 107 Performance monitoring interrupts IWI: 10798 10253 324600 9684 IRQ work interrupts RTR: 0 0 0 0 APIC ICR read retries RES: 64975 71046 133738 60757 Rescheduling interrupts CAL: 56447 91761 63249 58625 Function call interrupts TLB: 19908 28139 27394 26391 TLB shootdowns TRM: 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 Threshold APIC interrupts DFR: 0 0 0 0 Deferred Error APIC interrupts MCE: 0 0 0 0 Machine check exceptions MCP: 9 10 10 10 Machine check polls ERR: 0 MIS: 0 PIN: 0 0 0 0 Posted-interrupt notification event NPI: 0 0 0 0 Nested posted-interrupt event PIW: 0 0 0 0 Posted-interrupt wakeup event
Nice!
