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alienjon
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 Posted: Mon Jul 14, 2008 1:48 am Post subject: Need to run disable_hw_scan=1 to use wlan0 [solved] |
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The computer is a Toshiba Satellite A305 laptop with a Intel Corporation PRO/Wireless 3945ABG Network Connection wireless device (that's the lspci output) I followed some wiki's and forums and was able to configure the kernel appropriately, but it still was not working. I was, however, able to find a hack to get it to work. I found that if I run my wlan0 init script and then run the following code, it can connect to my router and, subsequently, the internet:
| Code: | modprobe -r iwl3945
modprobe iwl3945 disable_hw_scan=1 |
Apparently, by disabling hardware scanning, it'll work just fine, but a) I don't know if there's a way to specify this every time the module loads (right now I have it in a small script I run whenever I start the computer) or better yet if b) there is a way to disable this in the kernel (or as the module is built).
Last edited by alienjon on Tue Jul 15, 2008 10:18 pm; edited 1 time in total |
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codergeek42
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| Posted: Mon Jul 14, 2008 5:13 am Post subject: |
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If it's built into your kernel statically, you can add it as a boot-time parameter such as 'iwl3945.disable_hw_scan=1'. (This would be appended to your "kernel /bzImage-version" line in your Grub config file.)
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alienjon
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| Posted: Mon Jul 14, 2008 5:15 am Post subject: |
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| naw, it's a module (unless I'm misinterpreting what you mean by 'static') |
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codergeek42
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| Posted: Mon Jul 14, 2008 5:21 am Post subject: |
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| alienjon wrote: | | naw, it's a module (unless I'm misinterpreting what you mean by 'static') |
OOOH. I think I see what you're saying.
If you want to add this as a permanent option for the module, you can use the /etc/modprobe.conf file. | Code: | # /etc/modprobe.conf
options iwl3945 disable_hw_scan=1 |
Its syntax for the options is very similar to that of modprobe directly, and is explained in the modprobe.conf(5) man page if you're further interested: | Code: | | $ man modprobe.conf |
This will cause these options to be used every time the module is loaded, without having to explicitly run "modprobe iwl3945 disable_hw_scan=1 other_option=foo" etc. 
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swimmer
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| Posted: Mon Jul 14, 2008 10:11 am Post subject: |
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Hmm - I don't trust that solution completely since I read this on the top of /etc/modprobe.conf
| Code: | ### This file is automatically generated by update-modules
#
# Please do not edit this file directly. If you want to change or add
# anything please take a look at the files in /etc/modprobe.d and read
# the manpage for update-modules(8). |
I'd suggest creating a file iwl3945 in /etc/modprobe.d/ with the line codergeek42 suggested ...
Sorry codergeek42 
Greetz
swimmer |
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codergeek42
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| Posted: Tue Jul 15, 2008 4:59 am Post subject: |
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| swimmer wrote: | [...] creating a file iwl3945 in /etc/modprobe.d/ with the line codergeek42 suggested ...
Sorry codergeek42 |
Heh; That's my "not used Gentoo in 2+ years" solution, so I appreciate your correction. Thanks.
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alienjon
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| Posted: Tue Jul 15, 2008 2:36 pm Post subject: |
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| I just added that line to /etc/modules.d/iwl3945 and upon rebooting I had the exact same problem (and again, reloading the module fixes it). Interestingly, though, is that I now see that line in the /etc/modules.conf file. I'm guessing that the modules.conf file loads the options from the modules.d sub-files. But now, I'm wondering, if the problem lays in that the module needs to be reloaded anyway for it to work? |
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swimmer
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| Posted: Tue Jul 15, 2008 10:13 pm Post subject: |
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*** /me crashes his head against the table ***
I should have told you that you have to run after that :-/
Sorry about that 
swimmer |
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alienjon
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| Posted: Tue Jul 15, 2008 10:17 pm Post subject: |
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Thanks
I actually just finished rebooting after working on another problem and noticed that it's working fine now (actually, it was a second reboot, so I'm not sure why it didn't work the first time, but oh well, it's good now) Thanks for the help |
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swimmer
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| Posted: Tue Jul 15, 2008 10:37 pm Post subject: |
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Glad to hear that it works now  |
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