Comment 92 for bug 1521173

I have a Dell Inspiron 5570 with Intel i7-8550U CPU. I face the same problem with the Ubuntu 16.04 OEM install and a fresh Kubuntu 18.04 install.

22/7/18 3:01 Μ.Μ. kernel pcieport 0000:00:1c.5: AER: Corrected error received: id=00e5
22/7/18 3:01 Μ.Μ. kernel pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Data Link Layer, id=00e5(Transmitter ID)
22/7/18 3:01 Μ.Μ. kernel pcieport 0000:00:1c.5: device [8086:9d15] error status/mask=00001000/00002000
22/7/18 3:01 Μ.Μ. kernel pcieport 0000:00:1c.5: [12] Replay Timer Timeout

$ lspci -tv
-[0000:00]-+-00.0 Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
           +-02.0 Intel Corporation UHD Graphics 620
           +-04.0 Intel Corporation Skylake Processor Thermal Subsystem
           +-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
           +-16.0 Intel Corporation Sunrise Point-LP CSME HECI #1
           +-17.0 Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode]
           +-1c.0-[01]----00.0 Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260/M265 / M340/M360 / M440/M445]
           +-1c.4-[02]----00.0 Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
           +-1c.5-[03]----00.0 Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter
           +-1f.0 Intel Corporation Device 9d4e
           +-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

I haven't tried the pci=noaer solution yet. However, judging from (https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt) that only disables the error reporting and thous is not a proper fix.