Hi all,

Here is a list of known regressions reported after 2.6.21 release.

Feel free to add new regressions/remove fixed etc.
http://kernelnewbies.org/known_regressions


Subject    : kernel crash at boot with maxcpus=1 on quad core
             kernel BUG at drivers/cpufreq/cpufreq.c:1023
References : http://lkml.org/lkml/2007/4/27/460
Submitter  : Brandeburg, Jesse <jesse.brandeburg@intel.com>
Status     : Unknow

Subject    : Soft lockup on CPU0 when resuming from suspension to ram, related to acpi processor module
References : http://bugzilla.kernel.org/show_bug.cgi?id=8391
Submitter  : Giorgio Lando <patroclo7@gmail.com>
Status     : Unknow

Subject    : Bad interaction between dynticks and amarok?
References : http://lkml.org/lkml/2007/4/26/307
Submitter  : Thomas Meyer <thomas.mey@web.de>
Status     : Unknow

Subject    : Long pause initializating usb-storage
References : http://bugzilla.kernel.org/show_bug.cgi?id=8380
Submitter  : Vincent Frentzel <zcecc22@ucl.ac.uk>
Status     : Unknow

Subject    : Multpiple problem when thermal is loaded with kernel 2.6.21
References : http://bugzilla.kernel.org/show_bug.cgi?id=8385
Submitter  : François Valenduc <francois.valenduc@skynet.be>
Status     : Unknow

Subject    : 2.6.21: sky2 "hw csum failure" problem
References : http://lkml.org/lkml/2007/4/28/105
Submitter  : Håkan Lindqvist <lindqvist@netstar.se>
Status     : unknown

Subject    : sky2 regression in 2.6.21: Asus P5B-E Plus ethernet adapter no more supported  
References : http://lkml.org/lkml/2007/4/26/599
Submitter  : Francois SIMOND <curio@free.fr> 
Handled-By : Stephen Hemminger <shemminger@linux-foundation.org>
Status     : unknown

Subject    : 2.6.21 - BUG: at arch/i386/kernel/smp.c:177 send_IPI_mask_bitmask()
References : http://lkml.org/lkml/2007/4/27/621
Submitter  : Jeff Chua <jeff.chua.linux@gmail.com>
Status     : unknown

Subject    : 2.6.21 don't boot, it stops after ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 *5 6 7 9 10 11 12 14 15).
References : http://lkml.org/lkml/2007/4/27/400
Submitter  : Riccardo Ricci < rricci@nuovanetmore.it >
Handled-By : Len Brown <lenb@kernel.org>
Status     : unknown

Subject    : ACPI interpreter errors
References : http://lkml.org/lkml/2007/4/27/206
Submitter  : Udo A. Steinberg < us15@os.inf.tu-dresden.de >
Handled-By : Len Brown <lenb@kernel.org>
Status     : unknown

Subject    : reiserfs -- circular locking
References : http://lkml.org/lkml/2007/4/26/648
Submitter  : David Brownell < david-b@pacbell.net >
Handled-By : Jeff Mahoney < jeffm@suse.com >
Patch      : http://lkml.org/lkml/2007/4/27/332
Status     : patch available

Regards,
Michal

-- 
Michal K. K. Piotrowski
Kernel Monkeys
(http://kernel.wikidot.com/start)
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