irda broken on Thinkpad T23 with 2.6.27-4-generic, works with 2.6.24-16-generic

I can confirm this bug on my machine (Acer Travelmate 660)
The problem is exact the same.

The nsc-ircc is loaded fine like the one in hardy.

The problem is also described in the following pages:
http://bugzilla.kernel.org/show_bug.cgi?id=11566
https://lists.linux-foundation.org/pipermail/bugme-new/2008-September/019844.html

For me, the described workaround (isn't really one I think) didn't worked.

looking forward to a solution :-D, so I can upgrade to intrepid.

I attached the dmesg output from hardy and intrepid, maybe in help in some way but I don't think so because I found no significant differences.

c,Ya

I forgot: My kernel version is 2.6.27-7-generic
c,Ya

Little Update:

I downloaded the linux source code via synaptic and replaced the nsc-ircc driver with the version from kernel 2.6.24-21. I compiled it and installed it -> Problem still exists, so the error isn't in the nsc-ircc driver, but I don't know where to search :-( I now installed the hardy kernel in intrepid and now IrDA works in intrepid but only with the old kernel.

Short note: irdadump runs much slower with the newer kernel, it seems that something is blocking.

c,Ya

You could try bisecting the differences.
Then you would know what caused it to stop working.
I'm sure that would be very helpful.

Sorry I don't know what you mean :-)
Can you explain it in other words please?

Update

I installed kernel version 2.6.28-3 from here: http://archive.ubuntu.com/ubuntu/pool/main/l/linux/
irda is still not working :-(

c,Ya

Ok, it seems that the irda subystem is broken in 2.6.27 :-(
Details are available here: http://bugzilla.kernel.org/show_bug.cgi?id=11795

c,Ya

I just compiled & installed kernel 2.6.28rc9 (latest prepatch) and IrDA works like expected :-D
I checked irdadump, ircp and ircomm0, everthing works :-).

I hope that these irda patches get backported to the intrepid kernel.

c,Ya

This seems to be the commit in question: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=69c30e1e7492192f882a3fc11888b320fde5206a

I verified that the patch fixes irda. Attaching it, cherry-picked against the current intrepid kernel tree.

So it will be included in future offical intrepid kernel updates?
Then I think we can mark this bug as fixed

c,Ya

This is not in ubuntu-intrepid/master.

@Johan - I presume you meant that you tested the patch cherry picked against the intrepid git tree, rather than actually committing it?

This is a severe regression as IrDA is not functional at all with Intrepid (upstream regression for 2.6.27, fixed in 2.6.28 with this patch as Johan points out above: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=69c30e1e7492192f882a3fc11888b320fde5206a).

What is needed to get this considered for SRU? I've read the StableReleaseUpdates wiki page but it isn't quite clear how this applies to the kernel.

The patch referenced at http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=69c30e1e7492192f882a3fc11888b320fde5206a is already available in the latest Jaunty release so setting this back to Fix Released. I'll add an Intrepid nomination for the kernel team to consider this for an SRU, but of course I'll leave it to the discretion of the kernel team to make the final decision if they'll indeed backport the patch. Thanks.

Intrepid Ibex reached end-of-life on 30 April 2010 so I am closing the
report. The bug has been fixed in newer releases of Ubuntu.