rt2x00: slow wifi with correct basic rate bitmap (was Re: stable? quality assurance?)
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From: John W. Linville on 13 Jul 2010 11:50 On Tue, Jul 13, 2010 at 02:50:14PM +0200, Stefan Richter wrote: > Alejandro Riveira Fern�ndez wrote: > > I for one stopped booting into -rc kernels. > > The fact that still have to patch my kernels with a *one* liner > > since 2.6.29 kernel [1] does not give me confidence on the "test > > report/bisect and it will be fixed" promise some have made in this > > threath > > > > [1] https://bugzilla.kernel.org/show_bug.cgi?id=13362 > > There were promises made in this thread? Then I must have read a > different mailinglist or so. > > I do not know why your WLAN regression has not been fixed yet, but at > least it seems rather plausible why commit > 7e0986c17f695952ce5d61ed793ce048ba90a661 is not going to be reverted (if > such a revert is the one-liner that you are referring to). > > Why is one reporter's rt2500 OK now though but not yours? Are there > different card revisions or firmwares out there that require quirk handling? The patch (7e0986c1) corrects an obvious error. Reverting it might improve your (i.e. Alejandro) performance, but it seems likely to cause connectivity problems for others. The fact that reverting 7e098c1 helps you suggests that rt2500usb isn't using the basic_rates map properly. But after reviewing the code and the data I have, I can't see what would be causing that. It is at least possible that your AP is sending bad rate information. Have you tried this device with other APs? John -- John W. Linville Someday the world will need a hero, and you linville(a)tuxdriver.com might be all we have. Be ready. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Alejandro Riveira Fernández on 13 Jul 2010 14:20 El Tue, 13 Jul 2010 14:50:14 +0200 Stefan Richter <stefanr(a)s5r6.in-berlin.de> escribió: > Alejandro Riveira Fernández wrote: > > I for one stopped booting into -rc kernels. > > The fact that still have to patch my kernels with a *one* liner > > since 2.6.29 kernel [1] does not give me confidence on the "test > > report/bisect and it will be fixed" promise some have made in this > > threath > > > > [1] https://bugzilla.kernel.org/show_bug.cgi?id=13362 > > There were promises made in this thread? Then I must have read a > different mailinglist or so. Ok no promises. Maybe I read to much in to Mr Tso previous mail. My apologies [quote] > So I tend to use -rc3, -rc4, and -rc5 kernels on my laptops, and when > I find bugs, I report them and I help fix them. If more people did > that, then the 2.6.X.0 releases would be more stable. But kernel > development is a volunteer effort, so it's up to the volunteers to > test and fix bugs during the rc4, -rc5 and -rc6 time frame. [...] > [...] Linux may be a very good bargain (look > at how much Oracle has increased its support contracts for Solaris!), > but it's still not a free lunch. At the end of the day, you get what > you put into it. I tested the kernels i reported the bugs and helped (to the best of my knowledge; I'm not a programmer) I got no result. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Alejandro Riveira Fernández on 13 Jul 2010 14:30 El Tue, 13 Jul 2010 11:35:31 -0400 "John W. Linville" <linville(a)tuxdriver.com> escribió: > > The patch (7e0986c1) corrects an obvious error. Reverting it might > improve your (i.e. Alejandro) performance, but it seems likely to > cause connectivity problems for others. > > The fact that reverting 7e098c1 helps you suggests that rt2500usb my card is pci so it would be rt2500pci > isn't using the basic_rates map properly. But after reviewing the > code and the data I have, I can't see what would be causing that. > It is at least possible that your AP is sending bad rate information. > Have you tried this device with other APs? No; this is a desktop pc that connects to my home router/AP. A new wifi card is cheaper than a new AP ... > > John -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: John W. Linville on 13 Jul 2010 14:50 On Tue, Jul 13, 2010 at 08:19:27PM +0200, Alejandro Riveira Fern�ndez wrote: > El Tue, 13 Jul 2010 11:35:31 -0400 > "John W. Linville" <linville(a)tuxdriver.com> escribi�: > > > > > > The patch (7e0986c1) corrects an obvious error. Reverting it might > > improve your (i.e. Alejandro) performance, but it seems likely to > > cause connectivity problems for others. > > > > The fact that reverting 7e098c1 helps you suggests that rt2500usb > > my card is pci so it would be rt2500pci Sorry, typo... > > isn't using the basic_rates map properly. But after reviewing the > > code and the data I have, I can't see what would be causing that. > > It is at least possible that your AP is sending bad rate information. > > Have you tried this device with other APs? > > No; this is a desktop pc that connects to my home router/AP. A new wifi > card is cheaper than a new AP ... Perhaps you could capture some beacons from that AP? -- John W. Linville Someday the world will need a hero, and you linville(a)tuxdriver.com might be all we have. Be ready. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Alejandro Riveira Fernández on 13 Jul 2010 15:10 El Tue, 13 Jul 2010 14:38:52 -0400 "John W. Linville" <linville(a)tuxdriver.com> escribió: > > > > isn't using the basic_rates map properly. But after reviewing the > > > code and the data I have, I can't see what would be causing that. > > > It is at least possible that your AP is sending bad rate information. > > > Have you tried this device with other APs? I do no know; i captured some debug data for Ivo back in the day and from what he said all the info passed to the card was correct... See http://lkml.org/lkml/2009/5/25/163 ( link is in bugzilla) in case you missed it > > > > No; this is a desktop pc that connects to my home router/AP. A new wifi > > card is cheaper than a new AP ... > > Perhaps you could capture some beacons from that AP? f you explain how; I can try. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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