Hi, On Tue, Aug 9, 2011 at 11:04 AM, Pavel Ivanov <paivanof@xxxxxxxxx> wrote: > Hi, > > I've tried to build and install kernel 3.0. The standard Ubuntu > configuration worked very well. But after I ran 'make localmodconfig', > rebuilt and rebooted my wireless didn't work. After some investigation > I've found that option CONFIG_WIRELESS_EXT is no longer set in .config > file. what is the ubuntu kernel version ? > But no matter how I tried to include it in .config file it was > automatically deleted by 'make oldconfig' and again kernel compiled > without it. well, .config is not meant to be edited manually. It is written at the top of the file: # Automatically generated file; DO NOT EDIT. > Then I've found that if I include in the build some > (completely unnecessary to me) wireless module which has 'select > WIRELESS_EXT' in its Kconfig then it stays in .config file and > resulting kernel works very well with my WiFi network. > expected behavior. > In fact even if > I add 'select WIRELESS_EXT' to Kconfig of the driver for my wireless > card (ath9k) everything works as well. > did you look at ubuntu kernel sources to see if the Kconfig entry ath9k driver had been changed to 'select WIRELESS_EXT' ? What may be more likely is that ubuntu is building a bundle of driver, and one of them include WIRELESS_EXT. > I'd think that such behavior is a bug, although I don't know on which > side. Either on the side of wireless drivers which all have to have > 'select WIRELESS_EXT' in their Kconfig files >From what you describe, I'd say yes. > or on the side of kbuild > system which doesn't allow me to set CONFIG_WIRELESS_EXT unless some > driver requires it. Interestingly enough requiring WIRELESS_EXT works > only with drivers, because I've tried to add CONFIG_LIBIPW (it > requires WIRELESS_EXT too) but it was automatically deleted from > .config file along with CONFIG_WIRELESS_EXT. So I couldn't include > only this library. > as Michal pointed out, that's the intended behavior. Could you generate a patch for the change you made to make your adapter works and send them to the wireless folks ? They are likely to be more aware of the various requirement and inter-dependency of the subsystem. Thanks, - Arnaud > Could you tell me if this is indeed a bug or am I missing something here? > I'm not subscribed to the lists so please add me in CC. > > > Pavel > -- > To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
