my investigation came to same conclusion as #109 (but I'm on 20.04 and latest kernel, so this is still relevant)
My configuration is as follows. It there is a need to get more information/logs, please let me know. -- Dell Latitude 7389 miki@DL-7389:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS" miki@DL-7389:~$ uname -a Linux DL-7389 5.4.0-31-generic #35-Ubuntu SMP Thu May 7 20:20:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux dmesg gets spammed by these error reports: [116522.584941] pcieport 0000:00:1c.0: AER: Corrected error received: 0000:00:1c.0 [116522.584959] pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID) [116522.584967] pcieport 0000:00:1c.0: AER: device [8086:9d17] error status/mask=00001000/00002000 [116522.584973] pcieport 0000:00:1c.0: AER: [12] Timeout [116533.643718] pcieport 0000:00:1c.0: AER: Corrected error received: 0000:00:1c.0 [116533.643735] pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID) [116533.643744] pcieport 0000:00:1c.0: AER: device [8086:9d17] error status/mask=00001000/00002000 [116533.643751] pcieport 0000:00:1c.0: AER: [12] Timeout [116559.755644] pcieport 0000:00:1c.0: AER: Corrected error received: 0000:00:1c.0 [116559.755655] pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID) [116559.755658] pcieport 0000:00:1c.0: AER: device [8086:9d17] error status/mask=00001000/00002000 [116559.755660] pcieport 0000:00:1c.0: AER: [12] Timeout Device causing it seems to be Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter: miki@DL-7389:~$ sudo lspci -t -v -[0000:00]-+-00.0 Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers +-02.0 Intel Corporation HD Graphics 620 +-04.0 Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem +-13.0 Intel Corporation Sunrise Point-LP Integrated Sensor Hub +-14.0 Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller +-14.2 Intel Corporation Sunrise Point-LP Thermal subsystem +-15.0 Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 +-15.1 Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 +-15.2 Intel Corporation Sunrise Point-LP Serial IO I2C Controller #2 +-16.0 Intel Corporation Sunrise Point-LP CSME HECI #1 +-1c.0-[01]----00.0 Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter +-1d.0-[02]----00.0 Toshiba Corporation Device 0116 +-1f.0 Intel Corporation Sunrise Point LPC Controller/eSPI Controller +-1f.2 Intel Corporation Sunrise Point-LP PMC +-1f.3 Intel Corporation Sunrise Point-LP HD Audio \-1f.4 Intel Corporation Sunrise Point-LP SMBus lspci -v detailed output for this device (strange that the serial number is read as zeros): 01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32) Subsystem: Dell QCA6174 802.11ac Wireless Network Adapter Flags: bus master, fast devsel, latency 0, IRQ 145 Memory at ef000000 (64-bit, non-prefetchable) [size=2M] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/8 Maskable+ 64bit- Capabilities: [70] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [148] Virtual Channel Capabilities: [168] Device Serial Number 00-00-00-00-00-00-00-00 Capabilities: [178] Latency Tolerance Reporting Capabilities: [180] L1 PM Substates Kernel driver in use: ath10k_pci Kernel modules: ath10k_pci lshw output for this device (here the serial number is visible correctly, I redacted): *-pci:0 description: PCI bridge product: Sunrise Point-LP PCI Express Root Port #8 vendor: Intel Corporation physical id: 1c bus info: pci@0000:00:1c.0 version: f1 width: 32 bits clock: 33MHz capabilities: pci pciexpress msi pm normal_decode bus_master cap_list configuration: driver=pcieport resources: irq:122 memory:ef000000-ef1fffff *-network description: Wireless interface product: QCA6174 802.11ac Wireless Network Adapter vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:01:00.0 logical name: wlp1s0 version: 32 serial: ------redacted------ width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=ath10k_pci driverversion=5.4.0-31-generic firmware=WLAN.RM.4.4.1-00140-QCARMSWPZ-1 ip=192.168.0.58 latency=0 link=yes multicast=yes wireless=IEEE 802.11 resources: irq:145 memory:ef000000-ef1fffff -- 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/1521173 Title: AER: Corrected error received: id=00e0 Status in Linux: Unknown Status in linux package in Ubuntu: Triaged Status in linux source package in Xenial: Triaged Bug description: WORKAROUND: add pci=noaer to your kernel command line: 1) edit /etc/default/grub and and add pci=noaer to the line starting with GRUB_CMDLINE_LINUX_DEFAULT. It will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=noaer" 2) run "sudo update-grub" 3) reboot ---- My dmesg gets completely spammed with the following messages appearing over and over again. It stops after one s3 cycle; it only happens after reboot. [ 5315.986588] pcieport 0000:00:1c.0: AER: Corrected error received: id=00e0 [ 5315.987249] pcieport 0000:00:1c.0: can't find device of ID00e0 [ 5315.995632] pcieport 0000:00:1c.0: AER: Corrected error received: id=00e0 [ 5315.995664] pcieport 0000:00:1c.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e0(Receiver ID) [ 5315.995674] pcieport 0000:00:1c.0: device [8086:9d14] error status/mask=00000001/00002000 [ 5315.995683] pcieport 0000:00:1c.0: [ 0] Receiver Error [ 5316.002772] pcieport 0000:00:1c.0: AER: Corrected error received: id=00e0 [ 5316.002811] pcieport 0000:00:1c.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e0(Receiver ID) [ 5316.002826] pcieport 0000:00:1c.0: device [8086:9d14] error status/mask=00000001/00002000 [ 5316.002838] pcieport 0000:00:1c.0: [ 0] Receiver Error [ 5316.009926] pcieport 0000:00:1c.0: AER: Corrected error received: id=00e0 [ 5316.009964] pcieport 0000:00:1c.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e0(Receiver ID) [ 5316.009979] pcieport 0000:00:1c.0: device [8086:9d14] error status/mask=00000001/00002000 [ 5316.009991] pcieport 0000:00:1c.0: [ 0] Receiver Error ProblemType: BugDistroRelease: Ubuntu 16.04 Package: linux-image-4.2.0-19-generic 4.2.0-19.23 [modified: boot/vmlinuz-4.2.0-19-generic] ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6 Uname: Linux 4.2.0-19-generic x86_64 ApportVersion: 2.19.2-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0c: david 1502 F...m pulseaudio /dev/snd/controlC0: david 1502 F.... pulseaudio CurrentDesktop: Unity Date: Mon Nov 30 13:19:00 2015 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=fe528b90-b4eb-4a20-82bd-6a03b79cfb14 InstallationDate: Installed on 2015-11-28 (2 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151127) MachineType: Dell Inc. Inspiron 13-7359 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic.efi.signed root=UUID=94d54f88-5d18-4e2b-960a-8717d6e618bb ro noprompt persistent quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-19-generic N/A linux-backports-modules-4.2.0-19-generic N/A linux-firmware 1.153SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/07/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: 01.00.00 dmi.board.name: 0NT3WX dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr01.00.00:bd08/07/2015:svnDellInc.:pnInspiron13-7359:pvr:rvnDellInc.:rn0NT3WX:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Inspiron 13-7359 dmi.sys.vendor: Dell Inc. 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