/srv/irclogs.ubuntu.com/2008/04/23/#ubuntu-kernel.txt

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krautmoin06:45
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ubuntudemonHey. Can I do anything to provide more information to this bug ? https://bugs.launchpad.net/ubuntu/+source/linux/+bug/220640 And does anybody know how to use ipw3945 with Hardy's kernel ?12:36
ubotuLaunchpad bug 220640 in linux "[hardy] iwl3945 + wpasupplicant fails to connect to university network. regression from gutsy (ipw3945+wpasupplicant)" [Undecided,New] 12:36
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amitkubuntudemon: https://bugs.edge.launchpad.net/ubuntu/+bug/21926812:49
ubotuLaunchpad bug 219268 in ubuntu "iwl3945 doesn't work with my wifi card (ipw3945 did)" [Undecided,New] 12:49
BenCubuntudemon: we don't have ipw3945 in hardy13:39
BenCubuntudemon: oops, misread the bug title13:50
BenCubuntudemon: anyway, install linux-backports-modules-hardy-generic13:51
BenCreboot and try that13:51
alex_joniubuntudemon: did you see http://ubuntuforums.org/showthread.php?p=4612681 ?13:57
ubuntudemonalex_joni thanks. but I don't think that will work. I don't have any LED issues. I'll try just in case :)14:01
alex_joniubuntudemon: the main point on that page was the "options iwl3945 disable_hw_scan=1"14:03
alex_jonithe led is just a minor nag14:03
ubuntudemonalex_joni does that work from a live cd ?14:03
alex_joniubuntudemon: it might14:05
ubuntudemonalex_joni thanks for the suggestion. it didn't work but I got different errors see : https://bugs.launchpad.net/linux/+bug/220640/comments/914:13
ubotuLaunchpad bug 220640 in linux "[hardy] iwl3945 + wpasupplicant fails to connect to university network. regression from gutsy (ipw3945+wpasupplicant)" [Undecided,New] 14:13
ubuntudemonalex_joni : I'm also talking in #ubuntu-bugs about this problem14:18
BenCubuntudemon: on a livecd boot do: sudo modprobe -r iwl3945; modprobe iwl3945 disable_hw_scan=114:22
ubuntudemonBenC : Thanks for the suggestion. I've tried something like that. It gives different error messages like "ioctl[SIOCSIWSCAN] Device or resource busy". I'm trying again to put more debugging information on this in the bug report.14:29
alex_joniBenC: it might be that starting the module once confuses the HW, and it won't work until a next reboot14:35
alex_joniubuntudemon: try disabling the module when starting the LiveCD.. I think there is a bootoption to disable a certain module from loading14:35
ubuntudemonBenC : Here's the newest debugging log : https://bugs.launchpad.net/linux/+bug/220640/comments/11  (different errors than when not using disable_hw_scan)14:37
ubotuLaunchpad bug 220640 in linux "[hardy] iwl3945 + wpasupplicant fails to connect to university network. regression from gutsy (ipw3945+wpasupplicant)" [Unknown,Confirmed] 14:37
ubuntudemonIs there a way to give disable_hw_scan=1 at bootup (using the live cd) ?14:39
sorenubuntudemon: Press F6.14:40
alex_jonimodule_name.parameter_name=value14:40
ubuntudemonso it's : iwl3945.disable_hw_scan=114:41
alex_joniso I would try iwl3945.disable_hw_scan=1 in the boot param list (the one you get with F6)14:41
ubuntudemonI'm trying now14:41
ubuntudemonI added it at the end of the line14:42
ubuntudemonunknow boot option .... ignoring14:42
ubuntudemonI must have done something wrong .. trying again14:42
ubuntudemonagain the "unkown boot option" thing14:43
ubuntudemonI just tried again with the same result.. so I must be doing something wrong14:45
ubuntudemonI'm pressing F6 and typing iwl3945.disable_hw_scan=1 at the end of the line. 14:47
ubuntudemonWhat about including the ipw3945 module in Ubuntu as an option ? It's possible see : http://james.colannino.org/downloads.html15:04
amitkubuntudemon: Hardy is being released tomorrow :) And ipw3945 isn't supported by Intel anymore.15:08
ubuntudemonAfter a reboot and using "sudo modprobe -r iwl3945 ; sudo modprobe iwl3945 disable_hw_scan=1" I'm seeing both errors in one run : ioctl[SIOCSIWENCODEEXT]: Invalid argument 15:12
ubuntudemonioctl[SIOCSIWSCAN] Device or resource busy15:12
ubuntudemonamitk : I know but I also found that a lot of people have all kinds of issues with iwl394515:13
rtg_ubuntudemon: have you tried LBM? It has a more recent release of iwlwifi.15:16
ubuntudemonrtg_ no I haven't. I have never heard about LBM. 15:19
ubuntudemonDo you mean linux-backports-modules ? Yes I have tried it.15:20
rtg_ubuntudemon: try installing linux-backports-modules for Hardy.15:20
rtg_ubuntudemon: oh.15:20
BenCubuntudemon: did you reboot after doing so?15:32
ubuntudemonBenC : I'm running of a Hardy livecd (RC). I'm running an encrypted Gutsy installation on my harddrive and I don't want to upgrade if I can't get wireless to work.15:34
ubuntudemonBut installing linux-backports-modules and modprobing iwl3945 seemed not to need a reboot because i'm seeing the led_class module which I didn't see before15:35
ubuntudemonsudo modinfo iwl3945 | grep srcversion gives : srcversion: FDE2E62843DE3ED112A50C315:39
ubuntudemonIs there anything else I can try from the live cd ?15:46
ubuntudemonTomorrow I'm helping someone who runs Gutsy to get on this wireless network. He also has intel 3945 wireless. Maybe we'll have time to test hardy live on his machine.15:50
ubuntudemonIf there is nothing else I can try I'm going home and I'll try any new suggestions tomorrow. Thanks everybody for your help.15:51
ubuntudemonBye all! 16:07
boritekhello16:33
boritek My ubuntu hardy heron uses the hard disk too much and for too long. It seems that it is probably kjournald, pdflush, and/or syslogd16:33
boritekit starts using the hard disk in about every 20 minutes for 1-3 minutes16:33
boritekand it slows down my system even slows applications like firefox inspite of the fact that CPU usage shows 30% only16:33
boritekwhy kjournald takes so much time? (if it is the culprit)16:34
boriteki made a `ps faux`: http://pastebin.com/d34cda40216:44
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boritekanybody?18:51
BenCboritek: are you sure it isn't the trackerd?19:55
boritekBenC, well it doesnt come up in the iotop or atop list19:56
boritekand i turned the updating off19:56
BenCis it swapping?19:56
boriteki dont think so, it keeps having 5% only19:57
boritekBenC, http://pastebin.com/d34cda40220:02
BenCNo, I mean is your system using swap20:06
alex_joniBenC: guess -16 will be the one for tomorrow?20:41
BenCyeah20:41
alex_jonicool :)20:42
fbondHi, sorry to bother with this sort of question: supposing I rebuilt ubuntu-backports-modules-2.6.22-14-generic on Feisty.  Everything seems to be in order, but the driver doesn't work correctly (snd-hda-intel).  I'm at a loss as to why that would be.  I get a DMA memory allocation error in dmesg.20:55
fbondfbond: (the driver works fine on Gutsy)20:55
rtgfbond: I'm confused. how do you build LBM 2.6.22 on Feisty? That is a Gutsy package.21:06
fbondrtg: I modified it slightly and turned it into a 2.6.20 package.21:11
fbondrtg: It only contains updated ALSA modules.21:11
fbondThose should work fine with either kernel version.  The snd-hda-intel driver in Feisty doesn't work with this hardware, but the snd-hda-intel from Gutsy does.  I can't dist upgrade the platform yet, though.21:12
fbondSeems that there's more to a working snd-hda-intel than what's in the module itself, though, and that caught me a bit by surprise.21:12
rtgfbond: yeah, I think you're on own on this one. I would suspect incorrect headers or something.21:13
rtgs/on own/on your own/21:13
fbondrtg: thanks21:21
boritekBenC, yes i have 2GB swap21:33
BenCboritek: but is it being used is what I am asking21:33
BenCboritek: like have you exhausted your memory and progs are swapping out21:33
boritekBenC, my Gnome-panel says the system is using 5% swap21:34
boriteki have 1GB RAM 61%used, 33%cache21:35
BenCboritek: can you pastebin /proc/meminfo21:35
boritekBenC, http://pastebin.com/d6c5bea6d21:36
BenCboritek: I suspect you are just getting swap usage and that causes disk usage21:38
boritekBenC, i never experienced this earlier21:38
boritekand it does it when i even dont do anything particular21:39
BenCyou may have more things running, or they may be using more memory21:39
boritekif there is 33% cache it can just free it up, right?21:39
boritekso there is plenty of memory, and swap isnt really used, its only 5%21:40
BenCit's still ~90Megs used, so there is something being written to it21:40
boritekand reserving disk for 2-3minutes it could read and write more hundred MBs21:41
boriteki shot down may services like, postfix, mysql, postgresql, and it still does this21:43
boritekmany*21:43
boritekBenC, i also got 100 iowait which is definitly abnormal i think21:46
boritek100%21:46
boriteksystem is quite unresponsive at those times21:47
boritekBenC, swap is not being in use21:55
boriteki am just watching it with iotop21:56
sleepsterhow have the ubuntu kernel diverged from the standard linux kernel?22:17
sleepsterand are the changes drastic?22:17
crimsunhttp://kernel.ubuntu.com/git/22:19
sleepsterso what is the best way to dive into kernel development?22:21
crimsunLinux? BSD? something distro-specific?22:21
sleepsterLinux22:21
crimsunhttp://kernelnewbies.org, probably22:21
sleepsterI am wondering if I should first implement my own kernel22:22
sleepsterto get hands on experience on how everything ties together22:22
JanConly if you have 2-3 years  ;)22:26
JanCwriting/fixing drivers might be a start though22:28
sleepstersounds good :)22:28
JanCAFAIK kernelnewbies is a good resource to get started22:29
sleepsterthanks22:29

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