F18: kworker is using up a lot of CPU
by Eberhard Schruefer
Hello,
I installed F18 on a Samsung NP700Z7C-S04 laptop. It is dual boot with
WIN 8 and has UEFI enabled,
but secure boot is disabled. I'm seeing kworker using up around 80% CPU
time constantly and the
laptop is running hot.
I found several similar reports on other lists. Suggestions found there
like having acpi=noirq and others
didn't help.
There is a closed bugzilla (Bug 840862) suggesting to do the following
to find the cause of the problem:
echo workqueue:workqueue_queue_work > /sys/kernel/debug/tracing/set_event
cat /sys/kernel/debug/tracing/trace_pipe > out.txt
In out.txt I find
CPU:3 [LOST 12401 EVENTS]
<idle>-0 [003] d.h. 1010.943940: workqueue_queue_work:
work struct=ffff880328a55910 function=acpi_os_execute_deferred
workqueue=ffff88032d856b40 req_cpu=0 cpu=0
<idle>-0 [003] d.h. 1010.943969: workqueue_queue_work:
work struct=ffff880328a55ad0 function=acpi_os_execute_deferred
workqueue=ffff88032d856b40 req_cpu=0 cpu=0
<idle>-0 [003] d.h. 1010.944000: workqueue_queue_work:
work struct=ffff880328a553d0 function=acpi_os_execute_deferred
workqueue=ffff88032d856b40 req_cpu=0 cpu=0
The acpi_os_execute_deferred message is showing up endlessly.
Also suggested in the bugzilla is doing
cat /proc/2/stack
[<ffffffff81082425>] kthreadd+0x1e5/0x1f0
[<ffffffff8163dfac>] ret_from_fork+0x7c/0xb0
[<ffffffffffffffff>] 0xffffffffffffffff
What to do with this information?
I'm running kernel 3.7.4-204.fc18.x86_64 (the earlier F18 kernels showed
the same behaviour).
Any help would be appreciated. Should I sent this to another list?
Thanks.
Eberhard
11 years, 5 months
Apache 2.4 and mod_proxy problem
by Scott van Looy
Hi,
Before upgrading to Fedora 18, I had IIS in a VM serving pages via Apache and mod_proxy. All was good and lovely. Post and get requests all worked.
I upgraded. Now, post requests above a certain size fail.
ProxyRequests Off
ProxyPreserveHost On
ProxyPass / http://127.0.0.1:8891/ connectiontimeout=5 timeout=30 Keepalive=On
ProxyPassReverse / http://127.0.0.1:8891/
Tried setting:
SetEnv proxy-sendchunked 0
SetEnv proxy-sendcl 1
All that happens is that the proxy server replies with:
Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /test.
Reason: Error reading from remote server
and in WindowsLand, the w3wp process that tried to receive the POST request is stuck at 100% CPU and needs killing.
I'm at a complete loss with this. Have any default behaviours changed in mod_proxy? It seems to me that if a complete request is bigger than a packet, it fails, but small requests work fine, possibly?
Making the request direct to IIS works.
And the really frustrating thing is that this all worked with the exact same setup before I upgraded to F18 and I can't find a list of what changed in mod_proxy between 2.2 and 2.4...
Does anyone have any suggestions?
Regards,
Scott
11 years, 5 months
Upgrade FC 16 to FC 17 problems
by George R Goffe
Hi,
I have the following message "The root for the previously installed system was not found".
Due to space issues I have made a few links into a larger partition, these were /tmp and /var/lib/yum/plugins/local. I changed /tmp to be in the root file system and made the link to local a link "../../../../export/home/var-lib-yum-plugins-local/". Now I get the above message.
Can anyone suggest what I should do now please?
Regards,
George...
11 years, 5 months
disable IPv6?
by Tom Horsley
My system at work seems to take a long time to start
the network. I have this suspicion it is waiting for
an IPv6 DHCP server to respond (which won't happen).
Would putting IPV6INIT=no in the ifcfg-em1 file
make this stop trying to use IPv6, or is there some
other way (this is with good old network, not
NetworkManager).
11 years, 5 months
F18: Gnome panel icons w a s t e s p a c e !
by NoSpaze
Hi.
After update to F18, my gnome panel icons (20px) spacings are too wide
(perhaps 1cm, fallback mode).
Googled, tried modifying spacings width gconf-editor, gconftool-2
gtk-widgets.css, ~/.config/gtk-3.0/settings.ini, but no success. They
are still wasting space.
Am I missing something? How can I reduce this space wasting?
Thanks! F18 going well as far...
--
NOSpaze <nospaze(a)gmail.com>
11 years, 5 months
Battery life improved with F18
by Bill Murray
Thanks guys,
I don't know what you did, but after upgrading my laptop
FC17->FC18 I
saw a 5 hr battery life being quoted - I never saw that long before.
It may be something to do with optimus? My nvidia video card is not
working inF18 as there
is no bumblebee rpm yet, but maybe someone worked out how to switch it
off by default?
(suits me). Anyway, I'm happy!
Bill
--
Bill Murray ---- ATLAS
STFC RAL at: Bat 40 4-C28, CERN,1211 Meyrin, Geneve 23, Switzerland
Tel:- CERN +41 22 7678432 or RAL +44 (0)1235 446256
11 years, 5 months
Sound gone from yum upgrade from F17->F18
by Ranjan Maitra
Hello,
I did an upgrade using:
http://fedoraproject.org/wiki/Upgrading_Fedora_using_yum#Fedora_17_-.3E_F...
and it was generally smooth and successful, which generally made me
ecstatic, until the two issues (from what I can tell up to now) came up:
1. Sound is gone. I have looked around all over, but am
unable to figure out what the problem is.
2. SELinux: My SELinux claims it is disabled. Here is what happens when
I try to change it:
$sudo setenforce 1
[sudo] password for:
setenforce: SELinux is disabled
There are a couple of minor issues, but I think these major ones are
most important to me at this point.
Any help/suggestions?
Many thanks and best wishes,
Ranjan
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11 years, 5 months
