4.13 without modifications:
http://paste.ubuntu.com/25499163/
scp (cubic)
➜ /tmp scp testfile srv:/tmp
testfile
This is the most heavily loaded configuration I use with this device and
I don't have issues with either an NVMe SSD or GPU. No hardware-related
issues with any USB devices (data goes through PCIe in the end).
➜ ~ lspci -v -t
-[:00]-+-00.0 Intel Corporation Device 5910
I did get a lot of corrected PCIe errors previously which is why I set
pcie_aspm=off (otherwise it flooded my kernel log instantly)
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687714
https://launchpadlibrarian.net/318000853/dmesg_pcie_aspm_rc8.log
I need to think of a good test for
I don't have a special wireless off/on button on my keyboard but I'm
assuming rfkill will do (soft kill switch).
The issue does not get triggered by the following loop (I may leave it
for several hours to get a better picture and modify to wait more
intelligently):
➜ ~ while
** Attachment added: "ath10k-repro4.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670706/+attachment/4943912/+files/ath10k-repro4.log
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Got a repro on 4.13.0-041300rc7 with the debug mask above set.
** Attachment added: "ath10k-repro3.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670706/+attachment/4942967/+files/ath10k-repro3.log
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SRU request thread:
https://lists.ubuntu.com/archives/kernel-team/2017-July/086054.html
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https://bugs.launchpad.net/bugs/1705493
Title:
[4.4][backport] Multiple
Eric,
I should have tried cubic in the previous (#46) test - quite an
interesting result: http://paste.ubuntu.com/25200234/ (6 tests cubic &
bbr)
lspci | grep QCA
3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network
Adapter (rev 32)
With cubic cwnd grows quite quickly
Eric, the UDP measurement was to provide a rough estimate of what the AP
is capable of sustaining without congestion control and flow control.
I did not have a different card at hand, but right now I can provide a
similar measurement for comparison with the problematic card:
$ lspci | grep Wire
ubuntu@maas-xenial5:~$ uname -r
4.4.0-87-generic
ubuntu@maas-xenial5:~$ sudo gdisk /dev/bcache0
GPT fdisk (gdisk) version 1.0.1
Partition table scan:
MBR: not present
BSD: not present
APM: not present
GPT: not present
Creating new GPT entries.
Command (? for help): ?
b back up
Likewise, on a non-congested network (802.11ac), directly from the
laptop to the AP:
uname -r
4.13.0-rc1
➜ linux git:(5771a8c08880) ✗ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr
➜ linux git:(5771a8c08880) ✗ iperf3 -u -b 1000M -c rtr
Connecting to host rtr, port 5201
[ 4] local
I've built a 4.13-rc1 (5771a8c08880) kernel and have done some laptop
(4.13, bbr) <-> AP <-> laptop (4.4 cubic) tests. Not sure about the AP
and there is a fair amount of wireless devices on the network I was
connected to. Most of them have Cubic congestion control but I am not
sure how fair they
Public bug reported:
Support for adding partitions on bcache devices only landed in 4.10:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8c0d911ac5285e6be8967713271a51bdc5a936a
Although it is a small change, it is not backported to any of the xenial
kernels and
** Attachment added: "dmesg-4.12-custom-ath10k-repro3.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670706/+attachment/4915613/+files/dmesg-4.12-custom-ath10k-repro3.log
** Changed in: linux (Ubuntu)
Status: Expired => New
** Summary changed:
- Kernel Call Trace After
Still getting the same on the released 4.12 kernel.
Observations this time:
* Within a good range of an access point
* No power events (haven't closed a lid or anything like that)
* No high load no the wireless card
[12920.203097] usbcore: registered new interface driver snd-usb-audio
4.12 + the first change from
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/33
+ 802.11ac network => looks better.
➜ linux git:(6f7da290413b) ✗ git --no-pager diff
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 4858e190f6ac..abcfecfb8bbe 100644
---
Tested with http://kernel.ubuntu.com/~jsalisbury/lp1670041/ on a 2.4 GHz
network.
iperf3: interrupt - the client has terminated
➜ ~ uname -r
4.10.0-26-generic
# UDP
➜ ~ iperf3 -u -b 1000M -c
Connecting to host , port 5201
[ 4] local 172.29.10.20 port 37973 connected to port 5201
[ ID]
Eric,
I will try to test it on Monday as I have a pretty slow uplink where I
am currently.
Hopefully, I will get back to my 5 GHz network on Thursday to do a
proper comparison with the data I had before.
Thanks a lot for the feedback and suggestions - really appreciate it!
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acelankao,
In 1692836 the same hack mentioned by Kalle was applied.
I am not sure it is a proper fix though as it has not landed upstream:
http://elixir.free-
electrons.com/linux/latest/source/drivers/net/wireless/ath/ath10k/mac.c#L4181
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Joseph,
No luck on 4.12.0-041200rc4-generic, unfortunately:
https://paste.ubuntu.com/24826561/
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https://bugs.launchpad.net/bugs/1670041
Title:
Poor performance of Atheros
** Description changed:
+ Update (2017-05-20):
+ Kalle Valo suggested a hack which increased client -> AP TCP performance - so
it does not look like a firmware issue as I thought originally, rather an
ath10k driver issue:
+
Sorry about the confusion: the commits are tagged with -53 and I
mentioned -52 in the apt output.
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https://bugs.launchpad.net/bugs/1679823
Title:
bond0: Invalid MTU 9000
Hi,
Guys, it should be there for both the Yakkety kernel and linux-generic-
hwe-16.04:
http://kernel.ubuntu.com/git/ubuntu/ubuntu-
xenial.git/commit/?id=7570ffb5145abf4413421c154077bc31abad1264
http://kernel.ubuntu.com/git/ubuntu/ubuntu-
Tested the patched kernel - the results are consistent now across laptop
-> server, server -> laptop tests for both TCP and UDP.
➜ ~ uname -a
Linux blade 4.10.0-20-generic #22~lp1670041 SMP Fri May 5 18:23:15 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
4 tests:
1) laptop -> server via AP (TCP);
2)
Eudald, I am sure. Tested multiple times.
# edit /etc/default/grub
sudo update-grub
sudo shutdown -r now
and you should be good.
https://www.kernel.org/doc/Documentation/admin-guide/kernel-
parameters.txt
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State
Power
Hi, just a quick update: I have not forgotten about trying out the new
kernel. I am currently geographically far away from the access point
that I used for testing and it is hard to find 802.11ac Wi-Fi in the
wild.
I will provide the test results once I get to the right environment.
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Thanks Joseph! I will try it out.
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Title:
Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless
1535)
Status in
Kalle,
The chip firmware was a guess based upon somebody else's feedback:
http://lists.infradead.org/pipermail/ath10k/2016-January/006714.html
It might not be true at all and I have done some investigation after
creating this bug report a month ago.
My notes from back then:
- iperf tcp vs udp
Joseph,
I did (the log rotated so you don't see the version number):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687714/+attachment/4870948/+files/dmesg_pcie_aspm_rc8.log
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Reproduced on 4.8-36-generic (the log has rotated due to the volume of
messages so the kernel version message is not there).
** Attachment added: "pcie_aspm_4.8.0-36-generic.log"
Reproduced on 4.8-36-generic (the log has rotated due to the volume of
messages so the kernel version message is not there).
** Attachment added: "pcie_aspm_4.8.0-36-generic.log"
Hi Joseph,
Not a regression. I installed Zesty while it was in beta on this machine
and an issue was there already.
Tried 4.8 on a live usb - had that issue as well.
This is a relatively new hw so 4.4 kernel was not possible to boot
properly.
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This is most likely a duplicate of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1521173
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https://bugs.launchpad.net/bugs/1687714
Title:
Unless pcie_aspm is
Public bug reported:
The kernel log is constantly filled with the following:
236.912499] pcieport :00:1c.5: AER: Corrected error received: id=00e5
[ 236.912545] pcieport :00:1c.5: PCIe Bus Error: severity=Corrected,
type=Data Link Layer, id=00e5(Transmitter ID)
[ 236.912553]
I have the same issue on the Razer Blade 2017 - the kernel log is
flooded with messages.
Disabling PCIe Active State Power Management helps:
GRUB_CMDLINE_LINUX_DEFAULT="quiet button.lid_init_state=open
pcie_aspm=off"
Tested that on 4.11.0-041100rc8-generic.
** Attachment added:
Reproduced on 4.10.0-11-generic after a long period of laptop inactivity
(see traces at the bottom).
https://paste.ubuntu.com/24184748/
Tried to unload and reload modules afterwards:
[99449.709484] ath10k_pci :3b:00.0: failed to read device register, device
is gone
[99449.709487]
Cannot reliably reproduce it even on the same kernel - will keep trying.
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Title:
Kernel Call Trace After Disabling an ath10k
Public bug reported:
Disabled a wireless adapter via NetworkManager. Got a kernel trace in
dmesg.
3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless
Network Adapter (rev 32)
uname -r
4.10.0-9-generic
https://paste.ubuntu.com/24131142/
There are also usb hot-plug messages
dima@blade:~$ uname -r
4.11.0-041100rc1-generic
dima@blade:~$ dpkg -l linux-firmware
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name
Confirmed *NFA364xp.bin and qca61x4_2_2.bin usage by Windows. linux-
firmware's version is definitely not up-to-date for this card as it
refers to NFA324i (see the paste link).
** Attachment added: ".inf file parsed by Windows"
** Description changed:
- I experience a very poor 802.11ac performance of a QCA6174 Wireless card
- (Killer Wireless 1535).
+ Update: added some forensics in the paste (a long read):
+ http://paste.ubuntu.com/24118478/
+
+ TL;DR with a bit of intuition:
+ We need a new firmware-5.bin from
Just to rule out the case of bad compatibility between the STA on the
router (Quantenna QSR1000 chipset, QT3840BC SoC in case of my RT-87U)
and the client WNIC I also checked with a different STA.
So the second router's 802.11ac hardware is Compex_WLE900VX Qualcomm
Atheros QCA9880 (V2) which uses
Public bug reported:
I experience a very poor 802.11ac performance of a QCA6174 Wireless card
(Killer Wireless 1535).
This is a dev version of Zesty with a recently released 4.10 kernel:
uname -r
4.10.0-9-generic
dpkg -l linux-firmware | grep ii
ii linux-firmware 1.163all
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