[4/5] 2.6.21-rc5: known regressions

[4/5] 2.6.21-rc5: known regressions

[Adrian Bunk]

This email lists some known regressions in Linus' tree compared to 2.6.20.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way
possibly involved with one or more of these issues.

Due to the huge amount of recipients, please trim the Cc when answering.


Subject    : ThinkPad X60: resume no longer works  (PCI related?)
References : http://lkml.org/lkml/2007/3/13/3
Submitter  : Dave Jones <davej@redhat.com>
             Jeremy Fitzhardinge <jeremy@goop.org>
Caused-By  : PCI merge
             commit 78149df6d565c36675463352d0bfe0000b02b7a7
Handled-By : Eric W. Biederman <ebiederm@xmission.com>
             Rafael J. Wysocki <rjw@sisk.pl>
Status     : problem is being debugged


Subject    : second suspend to disk in a row results in an oops  (MSI)
References : http://lkml.org/lkml/2007/3/17/43
             http://lkml.org/lkml/2007/3/22/150
             http://lkml.org/lkml/2007/3/26/205
             http://lkml.org/lkml/2007/3/26/76
Submitter  : Thomas Meyer <thomas@m3y3r.de>
             Frédéric Riss <frederic.riss@gmail.com>
             Marcus Better <marcus@better.se>
Handled-By : Eric W. Biederman <ebiederm@xmission.com>
Patch      : http://lkml.org/lkml/2007/3/24/136
Status     : patch was suggested


Subject    : Suspend to RAM doesn't work anymore  (ACPI?)
References : http://lkml.org/lkml/2007/3/19/128
             http://bugzilla.kernel.org/show_bug.cgi?id=8247
Submitter  : Tobias Doerffel <tobias.doerffel@gmail.com>
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
             Len Brown <len.brown@intel.com>
Status     : problem is being debugged


Subject    : s2ram autowake regression  (ACPI?)
References : http://lkml.org/lkml/2007/3/20/96
Submitter  : Pavel Machek <pavel@ucw.cz>
Handled-By : Len Brown <lenb@kernel.org>
Status     : submitter was asked to test a patch


Subject    : SATA breakage on resume
References : http://lkml.org/lkml/2007/3/7/233
Submitter  : Thomas Gleixner <tglx@linutronix.de>
             Soeren Sonnenburg <kernel@nn7.de>
Status     : unknown


Subject    : suspend to disk: keypress required for power down
References : http://lkml.org/lkml/2007/3/25/78
Submitter  : Thomas Meyer <thomas@m3y3r.de>
Status     : unknown


Subject    : resume from RAM corrupts vesafb console
References : http://lkml.org/lkml/2007/3/26/76
Submitter  : Marcus Better <marcus@better.se>
Handled-By : Pavel Machek <pavel@ucw.cz>
Status     : problem is being debugged


Subject    : suspend to disk: non-boot cpus are disabled again
References : http://lkml.org/lkml/2007/3/25/78
Submitter  : Thomas Meyer <thomas@m3y3r.de>
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
             Eric W. Biederman <ebiederm@xmission.com>
Status     : problem is being debugged


Subject    : ThinkPad doesn't resume from suspend to RAM
References : http://lkml.org/lkml/2007/2/27/80
             http://lkml.org/lkml/2007/2/28/348
Submitter  : Jens Axboe <jens.axboe@oracle.com>
             Jeff Chua <jeff.chua.linux@gmail.com>
Status     : unknown


Subject    : suspend to disk hangs  (microcode driver)
References : http://lkml.org/lkml/2007/3/16/126
Submitter  : Maxim Levitsky <maximlevitsky@gmail.com>
Caused-By  : Rafael J. Wysocki <rjw@sisk.pl>
             commit e3c7db621bed4afb8e231cb005057f2feb5db557
             commit ed746e3b18f4df18afa3763155972c5835f284c5
             commit 259130526c267550bc365d3015917d90667732f1
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
Patch      : http://lkml.org/lkml/2007/3/23/179
Status     : patch available



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Re: [4/5] 2.6.21-rc5: known regressions

[Rafael J. Wysocki]

On Tuesday, 27 March 2007 03:59, Adrian Bunk wrote:
> This email lists some known regressions in Linus' tree compared to 2.6.20.
> 
> If you find your name in the Cc header, you are either submitter of one
> of the bugs, maintainer of an affectected subsystem or driver, a patch
> of you caused a breakage or I'm considering you in any other way
> possibly involved with one or more of these issues.
> 
> Due to the huge amount of recipients, please trim the Cc when answering.

I think the following two:
 
> Subject    : suspend to disk: keypress required for power down
> References : http://lkml.org/lkml/2007/3/25/78
> Submitter  : Thomas Meyer <thomas@m3y3r.de>
> Status     : unknown
 
> Subject    : suspend to disk: non-boot cpus are disabled again
> References : http://lkml.org/lkml/2007/3/25/78
> Submitter  : Thomas Meyer <thomas@m3y3r.de>
> Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
>              Eric W. Biederman <ebiederm@xmission.com>
> Status     : problem is being debugged

are related to the same issue.

The problem is that we call disable_nonboot_cpus() in swsusp before
powering down the system in order to avoid triggering the WARN_ON()
in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() and this doesn't
work well on Thomas' system.

Since the problem has been introduced by commit
94985134b7b46848267ed6b734320db01c974e72
(swsusp: disable nonboot CPUs before entering platform suspend), I think it's
better to revert this commit and remove the the WARN_ON() in
arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() (appended is a patch that
removes the WARN_ON()).

Greetings,
Rafael


---
Remove the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping(),
which triggers every time during the suspend to disk in the platform mode, as
the potential problem it is related to doesn't seem to occur in practice.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
 arch/x86_64/kernel/acpi/sleep.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.21-rc5/arch/x86_64/kernel/acpi/sleep.c
===================================================================
--- linux-2.6.21-rc5.orig/arch/x86_64/kernel/acpi/sleep.c
+++ linux-2.6.21-rc5/arch/x86_64/kernel/acpi/sleep.c
@@ -66,8 +66,10 @@ static void init_low_mapping(void)
 {
 	pgd_t *slot0 = pgd_offset(current->mm, 0UL);
 	low_ptr = *slot0;
+	/* FIXME: We're playing with the current task's page tables here, which
+	 * is potentially dangerous on SMP systems.
+	 */
 	set_pgd(slot0, *pgd_offset(current->mm, PAGE_OFFSET));
-	WARN_ON(num_online_cpus() != 1);
 	local_flush_tlb();
 }
 

Re: [4/5] 2.6.21-rc5: known regressions

[Adrian Bunk]

On Tue, Mar 27, 2007 at 12:09:13PM +0200, Rafael J. Wysocki wrote:
> On Tuesday, 27 March 2007 03:59, Adrian Bunk wrote:
> > This email lists some known regressions in Linus' tree compared to 2.6.20.
> > 
> > If you find your name in the Cc header, you are either submitter of one
> > of the bugs, maintainer of an affectected subsystem or driver, a patch
> > of you caused a breakage or I'm considering you in any other way
> > possibly involved with one or more of these issues.
> > 
> > Due to the huge amount of recipients, please trim the Cc when answering.
> 
> I think the following two:
>  
> > Subject    : suspend to disk: keypress required for power down
> > References : http://lkml.org/lkml/2007/3/25/78
> > Submitter  : Thomas Meyer <thomas@m3y3r.de>
> > Status     : unknown
>  
> > Subject    : suspend to disk: non-boot cpus are disabled again
> > References : http://lkml.org/lkml/2007/3/25/78
> > Submitter  : Thomas Meyer <thomas@m3y3r.de>
> > Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
> >              Eric W. Biederman <ebiederm@xmission.com>
> > Status     : problem is being debugged
> 
> are related to the same issue.
> 
> The problem is that we call disable_nonboot_cpus() in swsusp before
> powering down the system in order to avoid triggering the WARN_ON()
> in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() and this doesn't
> work well on Thomas' system.
> 
> Since the problem has been introduced by commit
> 94985134b7b46848267ed6b734320db01c974e72
> (swsusp: disable nonboot CPUs before entering platform suspend), I think it's
> better to revert this commit and remove the the WARN_ON() in
> arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() (appended is a patch that
> removes the WARN_ON()).

It's now in Linus' tree.

Thomas (Meyer), are there any regressions left with the latest -git tree 
plus the MSI fix?

> Greetings,
> Rafael
>...

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [4/5] 2.6.21-rc5: known regressions

[Thomas Meyer]

Adrian Bunk schrieb:
> It's now in Linus' tree.
>
> Thomas (Meyer), are there any regressions left with the latest -git tree 
> plus the MSI fix?
>   
No, not for me.

[5/5] 2.6.21-rc5: known regressions

[Adrian Bunk]

This email lists some known regressions in Linus' tree compared to 2.6.20.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way
possibly involved with one or more of these issues.

Due to the huge amount of recipients, please trim the Cc when answering.


Subject    : MacMini doesn't come out of suspend to ram  (i386 clockevents)
             (CONFIG_HPET_TIMER)
References : http://lkml.org/lkml/2007/3/21/374
Submitter  : Frédéric Riss <frederic.riss@gmail.com>
             Tino Keitel <tino.keitel@gmx.de>
Caused-By  : Thomas Gleixner <tglx@linutronix.de>
             commit e9e2cdb412412326c4827fc78ba27f410d837e6e
Status     : unknown


Subject    : MacBook Core Duo: suspend to disk hangs
References : http://bugzilla.kernel.org/show_bug.cgi?id=8224
Submitter  : Mike Harris <atarimike@wavecable.com>
Status     : unknown


Subject    : Dynticks and High resolution Timer hang boot during IDE detection
             workaround: clocksource=acpi_pm
References : http://lkml.org/lkml/2007/3/7/504
Submitter  : Stephane Casset <sept@logidee.com>
Caused-By  : John Stultz <johnstul@us.ibm.com>
             commit 6bb74df481223731af6c7e0ff3adb31f6442cfcd
Handled-By : John Stultz <johnstul@us.ibm.com>
Patch      : http://lkml.org/lkml/2007/3/22/287
Status     : workaround-patch available


Subject    : after resume: X hangs after drawing a couple of windows
             workaround: clocksource=acpi_pm
References : http://lkml.org/lkml/2007/3/8/117
             http://lkml.org/lkml/2007/3/25/20
             http://lkml.org/lkml/2007/3/26/151
Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
Handled-By : Thomas Gleixner <tglx@linutronix.de>
Status     : problem is being debugged


Subject    : first disk access after resume takes several minutes
             resume from RAM broken
             'date' does not advance after resume from RAM  (CONFIG_HPET_TIMER)
References : http://lkml.org/lkml/2007/3/8/117
             http://lkml.org/lkml/2007/3/25/20
             http://lkml.org/lkml/2007/3/26/18
Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
             Jeff Chua <jeff.chua.linux@gmail.com>
Handled-By : Thomas Gleixner <tglx@linutronix.de>
             Ingo Molnar <mingo@elte.hu>
Status     : problem is being debugged


Subject    : system doesn't come out of suspend  (CONFIG_NO_HZ)
References : http://lkml.org/lkml/2007/2/22/391
Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
             Soeren Sonnenburg <kernel@nn7.de>
Handled-By : Thomas Gleixner <tglx@linutronix.de>
             Ingo Molnar <mingo@elte.hu>
             Tejun Heo <htejun@gmail.com>
             Rafael J. Wysocki <rjw@sisk.pl>
Status     : unknown


Subject    : suspend to disk hangs  (CONFIG_NO_HZ)
References : http://lkml.org/lkml/2007/3/25/217
Submitter  : Jeff Chua <jeff.chua.linux@gmail.com>
Status     : unknown

[3/4] 2.6.21-rc5: known regressions (v2)

[Adrian Bunk]

This email lists some known regressions in Linus' tree compared to 2.6.20.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way
possibly involved with one or more of these issues.

Due to the huge amount of recipients, please trim the Cc when answering.


Subject    : ThinkPad X60: resume no longer works  (PCI related?)
References : http://lkml.org/lkml/2007/3/13/3
Submitter  : Dave Jones <davej@redhat.com>
             Jeremy Fitzhardinge <jeremy@goop.org>
Caused-By  : PCI merge
             commit 78149df6d565c36675463352d0bfe0000b02b7a7
Handled-By : Eric W. Biederman <ebiederm@xmission.com>
             Rafael J. Wysocki <rjw@sisk.pl>
Status     : problem is being debugged


Subject    : Suspend to RAM doesn't work anymore  (ACPI?)
References : http://lkml.org/lkml/2007/3/19/128
             http://bugzilla.kernel.org/show_bug.cgi?id=8247
Submitter  : Tobias Doerffel <tobias.doerffel@gmail.com>
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
             Len Brown <len.brown@intel.com>
Status     : problem is being debugged


Subject    : SATA breakage on resume
References : http://lkml.org/lkml/2007/3/7/233
Submitter  : Thomas Gleixner <tglx@linutronix.de>
             Soeren Sonnenburg <kernel@nn7.de>
Status     : unknown


Subject    : resume from RAM corrupts vesafb console
References : http://lkml.org/lkml/2007/3/26/76
Submitter  : Marcus Better <marcus@better.se>
Handled-By : Pavel Machek <pavel@ucw.cz>
Status     : problem is being debugged


Subject    : ThinkPad doesn't resume from suspend to RAM
References : http://lkml.org/lkml/2007/2/27/80
             http://lkml.org/lkml/2007/2/28/348
Submitter  : Jens Axboe <jens.axboe@oracle.com>
             Jeff Chua <jeff.chua.linux@gmail.com>
Status     : unknown


Subject    : MacBook Core Duo: suspend to memory wakeup hang
References : http://bugzilla.kernel.org/show_bug.cgi?id=8272
Submitter  : Mike Harris <atarimike@wavecable.com>
Status     : unknown


Subject    : suspend to disk hangs  (skge)
References : http://lkml.org/lkml/2007/3/27/212
Submitter  : Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Caused-By  : Stephen Hemminger <shemminger@linux-foundation.org>
             commit a504e64ab42bcc27074ea37405d06833ed6e0820
Status     : unknown


Subject    : suspend to disk hangs  (microcode driver)
References : http://lkml.org/lkml/2007/3/16/126
Submitter  : Maxim Levitsky <maximlevitsky@gmail.com>
Caused-By  : Rafael J. Wysocki <rjw@sisk.pl>
             commit e3c7db621bed4afb8e231cb005057f2feb5db557
             commit ed746e3b18f4df18afa3763155972c5835f284c5
             commit 259130526c267550bc365d3015917d90667732f1
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
Patch      : http://lkml.org/lkml/2007/3/25/71
Status     : patch available

Re: [3/4] 2.6.21-rc5: known regressions (v2)

[Jeff Chua]

On 3/31/07, Adrian Bunk <bunk@stusta.de> wrote:

> Subject    : ThinkPad doesn't resume from suspend to RAM
> References : http://lkml.org/lkml/2007/2/27/80
>              http://lkml.org/lkml/2007/2/28/348
> Submitter  : Jens Axboe <jens.axboe@oracle.com>
>              Jeff Chua <jeff.chua.linux@gmail.com>
> Status     : unknown

Fixed with CONFIG_NO_HZ unset and patch from Maxim
(http://lkml.org/lkml/2007/3/29/108).

Thanks,
Jeff,

Re: [3/4] 2.6.21-rc5: known regressions (v2)

[Adrian Bunk]

On Sat, Mar 31, 2007 at 10:52:59AM +0800, Jeff Chua wrote:
> On 3/31/07, Adrian Bunk <bunk@stusta.de> wrote:
> 
> >Subject    : ThinkPad doesn't resume from suspend to RAM
> >References : http://lkml.org/lkml/2007/2/27/80
> >             http://lkml.org/lkml/2007/2/28/348
> >Submitter  : Jens Axboe <jens.axboe@oracle.com>
> >             Jeff Chua <jeff.chua.linux@gmail.com>
> >Status     : unknown
> 
> Fixed with CONFIG_NO_HZ unset and patch from Maxim
> (http://lkml.org/lkml/2007/3/29/108).

Thanks for this information.

Jens, does suspend to RAM also work for you with the latest -git?

> Thanks,
> Jeff,

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Re: [3/4] 2.6.21-rc5: known regressions (v2)

[Jens Axboe]

On Sat, Mar 31 2007, Adrian Bunk wrote:
> On Sat, Mar 31, 2007 at 10:52:59AM +0800, Jeff Chua wrote:
> > On 3/31/07, Adrian Bunk <bunk@stusta.de> wrote:
> > 
> > >Subject    : ThinkPad doesn't resume from suspend to RAM
> > >References : http://lkml.org/lkml/2007/2/27/80
> > >             http://lkml.org/lkml/2007/2/28/348
> > >Submitter  : Jens Axboe <jens.axboe@oracle.com>
> > >             Jeff Chua <jeff.chua.linux@gmail.com>
> > >Status     : unknown
> > 
> > Fixed with CONFIG_NO_HZ unset and patch from Maxim
> > (http://lkml.org/lkml/2007/3/29/108).
> 
> Thanks for this information.
> 
> Jens, does suspend to RAM also work for you with the latest -git?

Yep, it does, no problems since the last -rc.

-- 
Jens Axboe

Re: [3/4] 2.6.21-rc5: known regressions (v2)

[Jeremy Fitzhardinge]

Adrian Bunk wrote:
> Subject    : ThinkPad X60: resume no longer works  (PCI related?)
> References : http://lkml.org/lkml/2007/3/13/3
> Submitter  : Dave Jones <davej@redhat.com>
>              Jeremy Fitzhardinge <jeremy@goop.org>
> Caused-By  : PCI merge
>              commit 78149df6d565c36675463352d0bfe0000b02b7a7
> Handled-By : Eric W. Biederman <ebiederm@xmission.com>
>              Rafael J. Wysocki <rjw@sisk.pl>
> Status     : problem is being debugged
>   

I know this is currently a subject of discussion on lkml, but I wanted
to confirm that booting with "hpet=disable" fixes this, and resume works
for me.  It ends up using acpi_pm as the clocksource.

    J

Re: [3/4] 2.6.21-rc5: known regressions (v2)

[Michal Piotrowski]

On 30/03/07, Adrian Bunk <bunk@stusta.de> wrote:
> Subject    : suspend to disk hangs  (skge)
> References : http://lkml.org/lkml/2007/3/27/212
> Submitter  : Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
> Caused-By  : Stephen Hemminger <shemminger@linux-foundation.org>
>              commit a504e64ab42bcc27074ea37405d06833ed6e0820
> Status     : unknown

This problem is fixed in 2.6.21-rc6-git5 (commit
692412b31ffb5df00197ea591dd635fc07506c02).

Huge thanks to Stephen.

Regards,
Michal

-- 
Michal K. K. Piotrowski
LTG - Linux Testers Group (PL)
(http://www.stardust.webpages.pl/ltg/)
LTG - Linux Testers Group (EN)
(http://www.stardust.webpages.pl/linux_testers_group_en/)

[4/4] 2.6.21-rc5: known regressions (v2)

[Adrian Bunk]

[ this time with a Cc... ]

This email lists some known regressions in Linus' tree compared to 2.6.20.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way
possibly involved with one or more of these issues.

Due to the huge amount of recipients, please trim the Cc when answering.


Subject    : MacMini doesn't come out of suspend to ram  (i386 clockevents)
             (CONFIG_HPET_TIMER)
References : http://lkml.org/lkml/2007/3/21/374
Submitter  : Frédéric Riss <frederic.riss@gmail.com>
             Tino Keitel <tino.keitel@gmx.de>
Caused-By  : Thomas Gleixner <tglx@linutronix.de>
             commit e9e2cdb412412326c4827fc78ba27f410d837e6e
Status     : unknown


Subject    : after resume: X hangs after drawing a couple of windows
             workaround: clocksource=acpi_pm
References : http://lkml.org/lkml/2007/3/8/117
             http://lkml.org/lkml/2007/3/25/20
             http://lkml.org/lkml/2007/3/26/151
Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
Handled-By : Thomas Gleixner <tglx@linutronix.de>
Status     : problem is being debugged


Subject    : system doesn't come out of suspend  (CONFIG_NO_HZ)
References : http://lkml.org/lkml/2007/2/22/391
Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
             Soeren Sonnenburg <kernel@nn7.de>
Handled-By : Thomas Gleixner <tglx@linutronix.de>
             Ingo Molnar <mingo@elte.hu>
             Tejun Heo <htejun@gmail.com>
             Rafael J. Wysocki <rjw@sisk.pl>
Status     : unknown


Subject    : suspend to disk hangs  (CONFIG_NO_HZ)
References : http://lkml.org/lkml/2007/3/25/217
Submitter  : Jeff Chua <jeff.chua.linux@gmail.com>
Status     : unknown

Re: [4/4] 2.6.21-rc5: known regressions (v2)

[Jeff Chua]

On 3/31/07, Adrian Bunk <bunk@stusta.de> wrote:

> Subject    : suspend to disk hangs  (CONFIG_NO_HZ)
> References : http://lkml.org/lkml/2007/3/25/217
> Submitter  : Jeff Chua <jeff.chua.linux@gmail.com>
> Status     : unknown

Still broken on.2.6.21-rc5.

Jeff.

Re: [4/4] 2.6.21-rc5: known regressions (v2)

[Frédéric Riss]

Le vendredi 30 mars 2007 à 23:49 +0200, Adrian Bunk a écrit :
> Subject    : MacMini doesn't come out of suspend to ram  (i386 clockevents)
>              (CONFIG_HPET_TIMER)
> References : http://lkml.org/lkml/2007/3/21/374
> Submitter  : Frédéric Riss <frederic.riss@gmail.com>
>              Tino Keitel <tino.keitel@gmx.de>
> Caused-By  : Thomas Gleixner <tglx@linutronix.de>
>              commit e9e2cdb412412326c4827fc78ba27f410d837e6e
> Status     : unknown

This one has been fixed by 399afa4fc9238fbae42116cf25a54671c0e8f56e.
Suspend to ram now works with HPET enabled (and regardless of the NO_HZ
setting).

Thanks!

Fred.

Re: [4/4] 2.6.21-rc5: known regressions (v2)

[Michael S. Tsirkin]

> Subject    : after resume: X hangs after drawing a couple of windows
>              workaround: clocksource=acpi_pm
> References : http://lkml.org/lkml/2007/3/8/117
>              http://lkml.org/lkml/2007/3/25/20
>              http://lkml.org/lkml/2007/3/26/151
> Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
> Handled-By : Thomas Gleixner <tglx@linutronix.de>
> Status     : problem is being debugged

Adrian,
the bug was found by Maxim Levitsky and
the following patch appears to have fixed the problem:
http://lkml.org/lkml/2007/3/28/104

the right way to fix it is still being discussed:
http://lkml.org/lkml/2007/3/28/182


-- 
MST

Re: [4/4] 2.6.21-rc5: known regressions (v2)

[Michael S. Tsirkin]

> Subject    : after resume: X hangs after drawing a couple of windows
>              workaround: clocksource=acpi_pm
> References : http://lkml.org/lkml/2007/3/8/117
>              http://lkml.org/lkml/2007/3/25/20
>              http://lkml.org/lkml/2007/3/26/151
> Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
> Handled-By : Thomas Gleixner <tglx@linutronix.de>
> Status     : problem is being debugged

Seems to be resolved with 399afa4fc9238fbae42116cf25a54671c0e8f56e.
Thanks Maxim!


-- 
MST

2.6.21-rc5: known regressions with patches (v2)

[Adrian Bunk]

This email lists some known regressions in Linus' tree compared to 2.6.20
with patches available.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way
possibly involved with one or more of these issues.

Due to the huge amount of recipients, please trim the Cc when answering.


Subject    : hung bootup in various drivers
References : http://lkml.org/lkml/2007/3/30/68
Submitter  : Ingo Molnar <mingo@elte.hu>
Handled-By : Kay Sievers <kay.sievers@vrfy.org>
Patch      : http://lkml.org/lkml/2007/3/30/323
Status     : patch available


Subject    : NCQ problem with ahci and Hitachi drive
References : http://lkml.org/lkml/2007/3/4/178
             http://lkml.org/lkml/2007/3/9/475
             http://lkml.org/lkml/2007/2/22/8
Submitter  : Mathieu Bérard <Mathieu.Berard@crans.org>
Handled-By : Tejun Heo <htejun@gmail.com>
             Robert Hancock <hancockr@shaw.ca>
Patch      : http://lkml.org/lkml/2007/2/22/8
Status     : possible patch available


Subject    : suspend to disk hangs  (microcode driver)
References : http://lkml.org/lkml/2007/3/16/126
Submitter  : Maxim Levitsky <maximlevitsky@gmail.com>
Caused-By  : Rafael J. Wysocki <rjw@sisk.pl>
             commit e3c7db621bed4afb8e231cb005057f2feb5db557
             commit ed746e3b18f4df18afa3763155972c5835f284c5
             commit 259130526c267550bc365d3015917d90667732f1
Handled-By : Rafael J. Wysocki <rjw@sisk.pl>
Patch      : http://lkml.org/lkml/2007/3/25/71
Status     : patch available

Re: [4/4] 2.6.21-rc5: known regressions (v2)

[Markus Rechberger]

Subject    : USB: Oops when changing DVB-T adapter
References : http://lkml.org/lkml/2007/3/9/212
Submitter  : CIJOML <cijoml@volny.cz>
Status     : unknown

regarding this one there's a fix available for unplugging dvb devices 
when they're in still in use.
The problem was that the filehandle was still open and the fops 
structure got deallocated immediatelly when a device got unplugged.

http://mcentral.de/hg/~mrec/v4l-dvb-stable/ (the last 3 patches)

Markus


On 4/1/07, Michael S. Tsirkin <mst@dev.mellanox.co.il> wrote:
 > > Subject    : after resume: X hangs after drawing a couple of windows
 > >              workaround: clocksource=acpi_pm
 > > References : http://lkml.org/lkml/2007/3/8/117
 > >              http://lkml.org/lkml/2007/3/25/20
 > >              http://lkml.org/lkml/2007/3/26/151
 > > Submitter  : Michael S. Tsirkin <mst@mellanox.co.il>
 > > Handled-By : Thomas Gleixner <tglx@linutronix.de>
 > > Status     : problem is being debugged
 >
 > Seems to be resolved with 399afa4fc9238fbae42116cf25a54671c0e8f56e.
 > Thanks Maxim!
 >
 >
 > --
 > MST
 > -
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 > Please read the FAQ at  http://www.tux.org/lkml/
 >


-- 
Markus Rechberger

-- 
Markus Rechberger
Operating System Research Center
AMD Saxony LLC & Co. KG