I have the same/similar issue on my RPi 4. While playing video with Kodi the Pi randomly will hang and be unresponsive to mouse, keyboard and display frozen. I can SSH and the web server plus torrent servers are still running fine but the cpu load slowly rises to something in the 8-9 range. If left alone it will recover after maybe 30-45 minutes and when it does the kernel posts the below two messages to dmesg. Always the same two messages. I have also seen the "kworker has blocked for more than 120 seconds" message as mentioned above but not lately.
Distro: Ubuntu MATE for Raspberry Pi 20.04 uname: Linux raspberry 5.8.0-1011-raspi #14-Ubuntu SMP PREEMPT Tue Dec 15 08:53:29 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux dmesg: [So Jan 10 04:31:09 2021] raspberrypi-firmware soc:firmware: mbox_send_message returned -62 [So Jan 10 04:31:09 2021] cpu cpu0: dev_pm_opp_set_rate: failed to find current OPP for freq 18446744073709551554 (-34) Based on the "dev_pm_opp_set_rate" error I assumed it was related to the cpufreq function so I changed the cpufreq governor to 'performance' and I haven't had any issues since. I'll continue testing and maybe someday try to debug the kernel but for now it's fixed by leaving the governor on performance. If I'm right then this isn't a Ubuntu bug but really a kernel bug, specific to the Raspberry Pi. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1908423 Title: 5.4.0-58-generic: Raspberry Pi 3 arm64 occasionally unresponsive Status in linux package in Ubuntu: Confirmed Bug description: Since upgrading to 5.4.0-56-generic my RPI3 devices started freezing randomly, about once every few hours. -56, -58 and -59 are affected, reverting *only* the kernel back to -53 got me 3 days without freeze. Diagnostics so far have not turned up anything useful, still busy figuring out cross-compile bisect and a reasonably fast reproduction. The devices are also known as (/proc/device-tree/compatible) raspberrypi,3-model-bbrcm,bcm2837 raspberrypi,3-model-b-plusbrcm,bcm2837 I only use them in ARM64 mode, and I only run -generic kernels via Pete Batards EDKII builds. (unreliable, slow) reproduction: 1. run affected aarch64 kernel 2. set low non-zero /proc/sys/kernel/hung_task_timeout_secs 3. utilize xorg through vc4 kms 4. check dmesg when display freezes symptom 1 (always the same -62): 13:52:01.832230 kernel: raspberrypi-firmware soc:firmware: mbox_send_message returned -62 13:52:01.839310 kernel: raspberrypi-clk raspberrypi-clk: Failed to change pllb frequency: -62 Note: similar message in Bug 1889637 Exactly one Google search result for the exact message: https://forum.openwrt.org/t/rpi-4-failed-to-change-pllb-frequency/81840 symptom 2 (varying hangs): [Dez15 16:09] INFO: task kworker/2:1:36 blocked for more than 120 seconds. [ +0,000019] Tainted: G C E 5.4.0-58-generic #64-Ubuntu [ +0,000004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ +0,000006] kworker/2:1 D 0 36 2 0x00000028 [ +0,000022] Workqueue: events dbs_work_handler [ +0,000004] Call trace: [ +0,000009] __switch_to+0xf8/0x1b0 [ +0,000008] __schedule+0x310/0x7d8 [ +0,000005] schedule+0x40/0xb8 [ +0,000004] schedule_timeout+0xa0/0x198 [ +0,000005] __wait_for_common+0xf0/0x230 [ +0,000005] wait_for_completion_timeout+0x38/0x48 [ +0,000006] mbox_send_message+0xd0/0x170 [ +0,000006] rpi_firmware_property_list+0xec/0x250 [ +0,000004] rpi_firmware_property+0x78/0xb8 [ +0,000010] raspberrypi_fw_pll_set_rate+0x60/0xe0 [clk_raspberrypi] [ +0,000008] clk_change_rate+0xdc/0x420 [ +0,000004] clk_core_set_rate_nolock+0x1cc/0x1f0 [ +0,000003] clk_set_rate+0x3c/0xc0 [ +0,000006] dev_pm_opp_set_rate+0x3d4/0x520 [ +0,000004] set_target+0x4c/0x90 [ +0,000007] __cpufreq_driver_target+0x2c8/0x678 [ +0,000004] od_dbs_update+0x144/0x1a0 [ +0,000003] dbs_work_handler+0x48/0x80 [ +0,000006] process_one_work+0x1d0/0x468 [ +0,000005] worker_thread+0x154/0x4e0 [ +0,000004] kthread+0xf0/0x118 [ +0,000004] ret_from_fork+0x10/0x18 non-kernel-version explanations ruled out: network adapter is neither idle nor saturated (~32MiB / hour on enxb827eb..) 4 different power supply models, 2 of them bad but not correlated with frequency of hang swap size & usage obviously does change system responsiveness, but not correlated with frequency of hang hang reported with & without use of wifi of device or any other device within 1m hang reported with & without config.txt dtoverlay=disable-wifi (NOT confirmed that even works) hang reported with cpu_thermal-virtual-0 between 59-67°C (3 copper plates, no fan) hang reported with & without kernel cmdline memtest=2 hang reported with & without kernel cmdline dwc_otg.speed=1 hang reported with firmware-1.20200601 & firmware-1.20201201 hang reported with /proc/device-tree/model "Raspberry Pi 3 Model B Rev 1.2" & "Raspberry Pi 3 Model B Plus Rev 1.3" hang reported with & without config.txt enable_uart=1,uart_2ndstage=1 hang reported with config.txt boot_delay=2 bootcode_delay=2 hang reported with EFI "rpi3 tianocore 1.27" & "rpi3 tianocore 1.31" hang reported with 5.4.0-56-generic usually after a few hours of uptime hang reported with 5.4.0-58-generic usually after a few hours of uptime hang reported with (hwe-edge) 5.8.0-31-generic usually after a few hours of uptime hang reported with 5.4.0-59-generic usually after a few hours of uptime never seen in versions 5.4.0-26-generic through 5.4.0-53-generic, with one notable exception while investigating: similiar hang reported with 5.4.0-53-generic if and only if attempting to unload i2c_bcm2835 module ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-58-generic 5.4.0-58.64 ProcVersionSignature: Ubuntu 5.4.0-58.64-generic 5.4.73 Uname: Linux 5.4.0-58-generic aarch64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-58-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.11-0ubuntu27.14 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC1', '/dev/snd/pcmC1D1p', '/dev/snd/pcmC1D0p', '/dev/snd/by-path', '/dev/snd/seq', '/dev/snd/controlC0', '/dev/snd/pcmC0D0p', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' CasperMD5CheckResult: skip Date: Tue Dec 15 16:46:43 2020 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lspci: Lspci-vt: -[0000:00]- Lsusb: Bus 001 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 003: ID 0424:ec00 Microchip Technology, Inc. (formerly SMSC) SMSC9512/9514 Fast Ethernet Adapter Bus 001 Device 002: ID 0424:9514 Microchip Technology, Inc. (formerly SMSC) SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Raspberry Pi Foundation Raspberry Pi 3 Model B PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 vc4drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-58-generic root=UUID=e3bc3b23-fd02-4250-8350-5916df6d6fd1 ro consoleblank=0 usbcore.authorized_default=0 splash fsck.repair=yes cma=128M ip=dhcp printk.devkmsg=on vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-58-generic N/A linux-backports-modules-5.4.0-58-generic N/A linux-firmware 1.187.6 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux StagingDrivers: snd_bcm2835 vchiq UpgradeStatus: No upgrade log present (probably fresh install) acpidump: dmi.bios.date: 11/13/2020 dmi.bios.vendor: https://github.com/pftf/RPi3 dmi.bios.version: UEFI Firmware v1.31 dmi.board.name: Raspberry Pi 3 Model B dmi.board.vendor: Sony UK dmi.board.version: A02082 dmi.chassis.type: 34 dmi.chassis.vendor: Sony UK dmi.chassis.version: Raspberry Pi 3 Model B dmi.modalias: dmi:bvnhttps//github.com/pftf/RPi3:bvrUEFIFirmwarev1.31:bd11/13/2020:svnRaspberryPiFoundation:pnRaspberryPi3ModelB:pvrA02082:rvnSonyUK:rnRaspberryPi3ModelB:rvrA02082:cvnSonyUK:ct34:cvrRaspberryPi3ModelB: dmi.product.family: Raspberry Pi dmi.product.name: Raspberry Pi 3 Model B dmi.product.sku: 0000000000A02082 dmi.product.version: A02082 dmi.sys.vendor: Raspberry Pi Foundation modified.conffile..etc.default.apport: enabled=0 mtime.conffile..etc.default.apport: 2020-07-06T13:01:13.327228 --- ProblemType: Bug AlsaVersion: Advanced Linux Sound Architecture Driver Version k5.4.0-59-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.11-0ubuntu27.14 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/seq', '/dev/snd/controlC0', '/dev/snd/pcmC0D0p', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' CasperMD5CheckResult: skip DistroRelease: Ubuntu 20.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lspci: Lspci-vt: -[0000:00]- Lsusb: Bus 001 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 001 Device 003: ID 0424:ec00 Microchip Technology, Inc. (formerly SMSC) SMSC9512/9514 Fast Ethernet Adapter Bus 001 Device 002: ID 0424:9514 Microchip Technology, Inc. (formerly SMSC) SMC9514 Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Raspberry Pi Foundation Raspberry Pi 3 Model B Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 vc4drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-59-generic root=UUID=e3bc3b23-fd02-4250-8350-5916df6d6fd1 ro consoleblank=0 usbcore.authorized_default=0 splash fsck.repair=yes cma=128M ip=dhcp printk.devkmsg=on vt.handoff=7 ProcVersionSignature: Ubuntu 5.4.0-59.65-generic 5.4.78 RelatedPackageVersions: linux-restricted-modules-5.4.0-59-generic N/A linux-backports-modules-5.4.0-59-generic N/A linux-firmware 1.187.6 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' StagingDrivers: snd_bcm2835 vchiq Tags: focal staging Uname: Linux 5.4.0-59-generic aarch64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True acpidump: dmi.bios.date: 11/13/2020 dmi.bios.vendor: https://github.com/pftf/RPi3 dmi.bios.version: UEFI Firmware v1.31 dmi.board.name: Raspberry Pi 3 Model B dmi.board.vendor: Sony UK dmi.board.version: A02082 dmi.chassis.type: 34 dmi.chassis.vendor: Sony UK dmi.chassis.version: Raspberry Pi 3 Model B dmi.modalias: dmi:bvnhttps//github.com/pftf/RPi3:bvrUEFIFirmwarev1.31:bd11/13/2020:svnRaspberryPiFoundation:pnRaspberryPi3ModelB:pvrA02082:rvnSonyUK:rnRaspberryPi3ModelB:rvrA02082:cvnSonyUK:ct34:cvrRaspberryPi3ModelB: dmi.product.family: Raspberry Pi dmi.product.name: Raspberry Pi 3 Model B dmi.product.sku: 0000000000A02082 dmi.product.version: A02082 dmi.sys.vendor: Raspberry Pi Foundation modified.conffile..etc.default.apport: enabled=0 mtime.conffile..etc.default.apport: 2020-07-06T13:01:13.327228 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1908423/+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
