NP900X3A-A01AU. Original came with Broadcom WiFi adaptor, I replaced it
with an Intel Ultimate-N 6300 (Model 633ANHMW).
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Tags removed: needs-full-computer-model
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Hi,
I've tested the latest upstream kernel and it seems the problem still
exists.
[hloeung@darkon tmp]$ uname -a
Linux darkon 3.11.10-03111001-generic #201312110635 SMP Wed Dec 11 11:35:43 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
(from
Hi,
I just upgraded to Trusty earlier on today so am now running with Linux
3.12. Still seeing the same issues:
| [hloeung@darkon tmp]$ cat /etc/lsb-release
| DISTRIB_ID=Ubuntu
| DISTRIB_RELEASE=14.04
| DISTRIB_CODENAME=trusty
| DISTRIB_DESCRIPTION=Ubuntu Trusty Tahr (development branch)
|
** Also affects: linux (Ubuntu Trusty)
Importance: Low
Status: Confirmed
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Title:
8086:422b [Samsung NP900X3A-A01AU] Intel
** Changed in: linux (Ubuntu Trusty)
Importance: Low = High
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Title:
8086:422b [Samsung NP900X3A-A01AU] Intel Centrino Ultimate-N
Still happening with the latest kernel (3.11.0-8):
[hloeung@darkon tmp]$ uname -a
Linux darkon 3.11.0-8-generic #15-Ubuntu SMP Fri Sep 20 04:11:26 UTC 2013
x86_64 x86_64 x86_64 GNU/Linux
[hloeung@darkon tmp]$ iwconfig
lono wireless extensions.
Module was only loaded with 802.11n
** This bug is no longer a duplicate of bug 836250
8086:4238 Intel Centrino Ultimate-N 6300 poor networking, packet loss and
very slow Lenovo X201 and T500 laptops
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** Tags removed: kernel-request-3.0.0-11.18 kernel-request-3.0.0-12.19
kernel-request-3.0.0-12.20 needs-upstream-testing
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Title:
Hi,
I've confirmed that adaptive keys are now restored and working after a
suspend and resume. Adaptive keys now switch and I can now access keys
to control volume and brightness.
Linux ragnar 3.13.0-26-generic #48-Ubuntu SMP Wed May 7 23:31:02 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
Confirmed it's still happening with an updated kernel:
| [ 241.558831] INFO: task bcache_writebac:501 blocked for more than 120
seconds.
| [ 241.648361] Not tainted 3.13.0-34-generic #60-Ubuntu
| [ 241.717161] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables
this message.
| [
Looks like there's a pending patch[1].
I used the fix suggested by Sam Fulcomer[2] to set
/sys/.../bcache/writeback_running to 0 because the cache mod we're using
is writethrough.
| $ cat /sys/block/bcache0/bcache/writeback_running
| 1
| $cat /sys/block/bcache0/bcache/state
| clean
| $ cat
Public bug reported:
Hi Guys,
Reading through the linux-firmware changelog, it seems that -13.ucode
was cherrypicked from
git://git.kernel.org/pub/scm/linux/kernel/git/egrumbach/linux-
firmware.git and included in 1.145. However, seems it's not loaded and
being used.
| [hloeung@ragnar ~]$
Err,:
| [hloeung@ragnar ~]$ ethtool -i wlan0
| driver: iwlwifi
| version: 4.1.0-2-generic
| firmware-version: 25.30.13.0
| ...
Previous was due to me playing around and moving the -13.ucode file out
of place.
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Ah, ignore that. As per It seems ethtool is the way to go.
| [hloeung@ragnar ~]$ ethtool -i wlan0
| driver: iwlwifi
| version: 4.1.0-2-generic
| firmware-version: 25.17.12.0
| ...
** Changed in: linux-firmware (Ubuntu)
Status: New = Invalid
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** Information type changed from Private to Public
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Title:
IBM POWER8 unhandled signal 11 / SEGV
Status in ubuntu-cloud-archive:
apport information
** Also affects: linux-meta-lts-vivid (Ubuntu)
Importance: Undecided
Status: New
** Tags added: apport-collected trusty uec-images
** Description changed:
Hi,
We're seeing this often on our HP Moonshot ARM64 nova-compute nodes
where qemu-nbd processes
apport information
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** Tags added: apport-collected
** Description changed:
Hi,
We have a few IBM POWER8 servers which we're currently using as
OpenStack nova compute nodes. It seems we're regularly running into
issues where processes are segfaulting:
| hloeung@gligar:~$ zgrep -E
** Also affects: linux-meta-lts-vivid (Ubuntu)
Importance: Undecided
Status: New
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Title:
IBM POWER8 unhandled signal 11 /
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** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Public bug reported:
Hi,
We're seeing this often on our HP Moonshot ARM64 nova-compute nodes
where qemu-nbd processes would lock up. At the same time, there's also a
bunch of kernel spew as follows:
| [605282.018238] block nbd3: Attempted send on closed socket
| [605282.018242] block nbd3:
Disabling KSM doesn't seem to have helped. Ryan's
(http://launchpad.net/~fo0bar) been working on getting hwe-w installed
on these compute nodes to see if a more recent kernel will help.
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7 day log rotate:
| hloeung@floette:~$ zgrep -h SEGV /var/log/syslog*
| Oct 28 14:46:34 floette kernel: [1351174.845829] init: rsyslog main process
(2652) killed by SEGV signal
| hloeung@bagon:~$ zgrep -h SEGV /var/log/syslog*
| Nov 2 22:17:03 bagon kernel: [2401829.665556] init:
Kernel OOPS on one of the mcdivitts:
| [544599.231964] block nbd0: Attempted send on closed socket
| [544599.231968] block nbd0: Attempted send on closed socket
| [544599.231972] block nbd0: Attempted send on closed socket
| [544599.231975] block nbd0: Attempted send on closed socket
|
We ran into this while setting up an OpenStack cloud using IBM POWER8
machines[1]. Unfortunately, hwe-v for Trusty isn't available
(LP:1504066) but hwe-u does indeed fix the "Oops: Exception in kernel
mode, sig: 4 [#47]" boot loop we ran into.
Since it's been advised here, and in several other
** Changed in: maas-images
Status: New => Confirmed
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Title:
kernel panic on IBM Power8 PPC MAAS ephemeral image
Status in
OOI, does this fix this?
| for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do
sudo sh -c "echo performance > $i"; done
If so, was the scaling governor set to "ondemand" by any chance?
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** Summary changed:
- Error parsing PCC subspaces from PCCT on ThinkPad-X1-Carbon-Type-20A7-20A8
+ Error parsing PCC subspaces from PCCT on ThinkPad X1
apport information
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Public bug reported:
May be the same issue or duplicate as LP:1528684. I've just updated the
BIOS to the latest (1.23) as per
http://support.lenovo.com/au/en/products/Laptops-and-netbooks/ThinkPad-X
-Series-laptops/ThinkPad-X1-Carbon-Type-20A7-20A8/downloads/DS039783 and
am still seeing this
apport information
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** Tags added: apport-collected xenial
** Description changed:
May be the same issue or duplicate as LP:1528684. I've just updated the
BIOS to the latest (1.23) as per
http://support.lenovo.com/au/en/products/Laptops-and-netbooks/ThinkPad-X
apport information
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Bug #1579278 to consider switching to "performamce" may be of relevance
here.
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Title:
revisit /etc/init.d/ondemand
Status in linux
In that same Google+ post, Arjan van de Ven wrote:
"""
Now, about ondemand and cpufreq.
The ondemand algorithm was designed roughly 10 years ago, for CPUs from that
era. If you look at what ondemand really ends up doing, is managing the
frequency during idle periods, and 10 years ago, that
Bug #1188647 enables Intel PSTATE by default.
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Title:
Consider changing default CPU frequency scaling governor back to
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Changed in: linux (Ubuntu Xenial)
Status: Incomplete => Confirmed
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** Summary changed:
- Consider changing default CPU frequency scaling governor back to "performance"
+ Consider changing default CPU frequency scaling governor back to
"performance" (Ubuntu Server)
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Public bug reported:
Hi,
With the new Ubuntu archive servers, we saw constantly high load and
after some tinkering, we found that it was mostly CPUs being woken up to
see if they should enter idle states. Changing the CPU frequency scaling
governor to "performance" saw a considerable drop.
Perf
As Theodore Ts'o has pointed out[1]:
"""
... with modern Intel processors, the ondemand CPU governor is actually
counterproductive because waking up to decide whether the CPU is idle keeps it
from entering the deepest sleep states, and so (somewhat counterintuitively)
the performance governor
| - 26.02% 0.08% swapper [kernel.kallsyms] [k]
cpu_startup_entry
|- 25.94% cpu_startup_entry
| - 23.65% call_cpuidle
| - 23.63% cpuidle_enter
| - 17.31% cpuidle_enter_state
| 17.04% intel_idle
| 0.04%
Ah thanks. So maybe /etc/init.d/ondemand should have something to
override or disable it (say DISABLE=1 in /etc/default/ondemand)?
Looking at it currently, it seems to prefer governors in this order -
interactive, ondemand, powersave. Even an option in
/etc/default/ondemand to specify the
Looking good so far with 4.4.0-63-generic.
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https://bugs.launchpad.net/bugs/1662378
Title:
many OOMs on busy xenial IMAP server with lots of available memory
Status in
pitti, can we please have a config option to disable "ondemand"?
As originally reported, one some workloads, it seems setting to
powersave/ondemand causes high load with CPUs checking to see if they
need to enter powersave state.
While the original report included perf report for the
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