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bug: many pcieport errors

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Hello, 

I help on the Ubuntu French forum and we see many times the same problem: kern.log and syslog are filled with an error which is repeated. Here is the error:

[   22.275320] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.275322] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.277322] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.277325] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.277327] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.278793] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.278795] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.278796] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.279211] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.279214] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.279216] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.279605] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.279608] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.279610] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.399607] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.399611] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.399613] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)
[   22.538521] pcieport 0000:00:1c.4: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e4(Receiver ID)
[   22.538525] pcieport 0000:00:1c.4:   device [8086:9d14] error status/mask=00000001/00000000
[   22.538527] pcieport 0000:00:1c.4:    [ 0] Receiver Error         (First)



This problem leads to filled hard drive (and it's fast!) for Ubuntu 16.04 versions, and for the 18.04.1 version, the live session can't be used: screen remains black with these errors written in white.

These two boot parameters avoid the problem but they have drawbacks, so it's a just a bypass solution: "pci=noaer" or "pci_aspm=off"

We also see that

[8086:9d14]
in the error is an intel bridge (Skylake architecture), and
0000:00:1c.4
is the RTL8723BE wifi card.
Many of the Ubuntu's French forum threads have the RTL8723BE card, and every thread has this intel bridge. So I don't know if it's specific of the RTL8723BE card, but on my pc, I don't have the problem and I have the RTL8723BE card but not the same intel bridge (Haswell architecture) and I tried with Xubuntu 16.04.1, Ubuntu 16.04.3 and Xubuntu 18.04.1 and no errors logged.

When we do
sudo modprobe -r rtl8723be
the errors stop logged. So maybe the boot parameter "modprobe.blacklist=rtl8723be" could be useful for tests.

That's all we know. If you have questions or some tests for finding where the problem is, don't hesitate.
Best regards

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