Comment 21 for bug 1726159

I attached the output of ssd's hdparm results.

2017-11-10 11:17 GMT+02:00 Kai-Heng Feng <email address hidden>:

> Can you attach the output of `hdparm -I /dev/sda`? Assume /dev/sda is
> the SSD.
>
> --
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> report.
> https://bugs.launchpad.net/bugs/1726159
>
> Title:
> PCIe BUS Error causing really slow laptop performance
>
> Status in linux package in Ubuntu:
> Confirmed
>
> Bug description:
> I recently bought the following laptop:
> Asus VivoBook X542UQ-DM148T - 15.6" (i7-7500U/8GB/256GB/GT 940MX 2GB)
>
> It came pre-installed with Win10 and I did a fresh install of Ubuntu
> 16.04 LTS. The screen was flickering for some reason and installing
> Ubuntu 17.04 fixed the issue.
>
> The real problem is that when I'm booting the laptop, the following
> error is being shown on my screen:
>
> [ 12.866073] pcieport 0000:00:1c.5: can't find device of ID00e5
> [ 12.898481] pcieport 0000:00:1c.5: AER: Multiple Corrected error
> received: id=00e5
> [ 12.898488] pcieport 0000:00:1c.5: PCIe Bus Error:
> severity=Corrected, type=Physical Layer, id=00e5(Receiver ID)
> [ 12.898491] pcieport 0000:00:1c.5: device [8086:9d15] error
> status/mask=00002041/00002000
> [ 12.898492] pcieport 0000:00:1c.5: [ 0] Receiver Error
> (First)
> [ 12.898493] pcieport 0000:00:1c.5: [ 6] Bad TLP
>
> I know that this error can be hid with one of the following kernel boot
> arguments:
> pci=nomsi / pci=noaer / pcie_aspm=off / pci=nommconf.
>
> The weird thing is that the above output is only being shown when the
> laptop is on AC Power (charging). When the laptop is not connected to
> AC (battery-mode), it has performance issues (slow boot and slow
> application launching). I was trying all day long to fix the problem.
> I removed everything that had to do with power-saving, reinstalled,
> re-tweaked for performance, tried different kernels but had no luck.
> While diagnosing, I had the idea to benchmark the "M2 SATA-3 SSD" that
> my laptop had. The results are:
>
> * On AC Power: 522MB/s (READ) | 416MB/s (WRITE)
> * On Battery Power: 32MB/s (READ) | 31MB/s (WRITE)
>
> This explains everyting. That's why I'm having a slow boot and slow
> application launching!
>
> Commands "lspci" and "dmesg" say that the error comes from the following
> device:
> 00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root
> Port #6 (rev f1)
>
> I will attach lspci and dmesg output on a tar.gz file.
>
> ------------------------------------------------------------
> --------------
> UPDATE: When the laptop is fully charged and still on AC (but not
> charging since it is 100% charged), the errors appear again but the SSD
> speed is normal (~500 Read/Write).
> ------------------------------------------------------------
> --------------
> UPDATE: I installed 'tlp' Advanced Power Management package and when
> using the command 'tlp ac', the SSD speed gets back to normal! The option
> does not persist across reboots.
> ------------------------------------------------------------
> --------------
>
> ProblemType: Bug
> DistroRelease: Ubuntu 17.04
> Package: linux-image-4.10.0-37-generic 4.10.0-37.41
> ProcVersionSignature: Ubuntu 4.10.0-37.41-generic 4.10.17
> Uname: Linux 4.10.0-37-generic x86_64
> ApportVersion: 2.20.4-0ubuntu4.5
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: georgem 2557 F.... pulseaudio
> CurrentDesktop: Unity:Unity7
> Date: Sun Oct 22 23:17:57 2017
> InstallationDate: Installed on 2017-10-20 (2 days ago)
> InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
> Lsusb:
> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 001 Device 004: ID 13d3:3496 IMC Networks
> Bus 001 Device 003: ID 13d3:5a01 IMC Networks
> Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> MachineType: ASUSTeK COMPUTER INC. X542UQ
> ProcFB: 0 inteldrmfb
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-37-generic.efi.signed
> root=UUID=38d32efc-d0cb-4a82-9e6c-e6a3bd62e51d ro quiet splash
> vt.handoff=7
> RelatedPackageVersions:
> linux-restricted-modules-4.10.0-37-generic N/A
> linux-backports-modules-4.10.0-37-generic N/A
> linux-firmware 1.164.1
> SourcePackage: linux
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 05/18/2017
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: X542UQ.202
> dmi.board.asset.tag: ATN12345678901234567
> dmi.board.name: X542UQ
> dmi.board.vendor: ASUSTeK COMPUTER INC.
> dmi.board.version: 1.0
> dmi.chassis.asset.tag: No Asset Tag
> dmi.chassis.type: 10
> dmi.chassis.vendor: ASUSTeK COMPUTER INC.
> dmi.chassis.version: 1.0
> dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX542UQ.202:bd05/18/2017:
> svnASUSTeKCOMPUTERINC.:pnX542UQ:pvr1.0:rvnASUSTeKCOMPUTERINC.:
> rnX542UQ:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
> dmi.product.name: X542UQ
> dmi.product.version: 1.0
> dmi.sys.vendor: ASUSTeK COMPUTER INC.
>
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