Ubuntu
linux-source-2.6.20 package

Regression: system clock runs at twice the speed

Bug #78292 reported by Timo Jyrinki on 2007-01-07

6

Affects		Status	Importance	Assigned to	Milestone
	Linux	Fix Released	Medium	linux-kernel-bugs #7789
	linux-source-2.6.20 (Ubuntu)	Fix Released	Medium	Unassigned

Bug Description

Binary package hint: linux-source-2.6.20

ATI RS482 chipset, AMD64. System clock runs at twice the speed. The bug was there in Ubuntu 5.10, but was fixed in Ubuntu 6.06 (and upstream kernel 2.6.15 had some notice about it being fixed). I didn't notice the problem with 2.6.19 earlier during feisty development, but 2.6.20 shows the problem again.

The chipset is buggy, and the kernel used to detect the bugginess and select correct options automatically. Now again it doesn't work without kernel option magic, so something has again been changed in disfavor of RS480/482 chipset users.

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Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#1

dmesg output Edit (19.7 KiB, text/plain)

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Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#2

lspci -nvv Edit (8.5 KiB, text/plain)

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Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#3

lspci -v Edit (5.8 KiB, text/plain)

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DaveThacker (dthacker9) wrote on 2007-01-07:

#4

Timo,
Thanks for the report and the diagnostic output. Could I please ask you to attach the output of dmesg and lspci as files, instead of pasting into comments. That will help move this into confirmed status. See https://wiki.ubuntu.com/DebuggingKernelProblems for the requirements.
Thanks, DaveThacker

Changed in linux-source-2.6.20:
assignee:	nobody → dthacker9
status:	Unconfirmed → Needs Info

Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#5

Eh... looks like attachments to me :)

Changed in linux-source-2.6.20:
status:	Needs Info → Unconfirmed

Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#6

lspci -vv Edit (10.1 KiB, text/plain)

As the reply was a copy-paste reply, I'm trying to figure out what more is being asked... here's lspci -vv now. If you can be more spefic, please be. And leave the mention about "not as comments" out when copy-pasteing the answer if the bug does not have logs inserted as comments.

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Timo Jyrinki (timo-jyrinki) wrote on 2007-01-07:

#7

dmesg output from 2.6.19-7 kernel Edit (19.1 KiB, text/plain)

I installed 2.6.19-7 and 2.6.20-5. Confirming that is not fixed in the 2.6.20-5, but working fine in 2.6.19-7. See the attached dmesg log for the 2.6.19-7 kernel.

Note that the following is _missing_ from the 2.6.20 log attached earlier:
[ 0.000000] ATI board detected. Disabling timer routing over 8254.
as is:
[ 31.368871] ..MP-BIOS bug: 8254 timer not connected to IO-APIC

Revision history for this message

DaveThacker (dthacker9) wrote on 2007-01-07:

#8

It was only half a copy/paste reply ;) Sorry, I must have missed the filenames in the attachments box. DaveThacker

Revision history for this message

DaveThacker (dthacker9) wrote on 2007-01-07:

#9

I think the necessary dumps and output have been provided. Moving to confirmed. DT

Changed in linux-source-2.6.20:
assignee:	dthacker9 → nobody
status:	Unconfirmed → Confirmed

Ben Collins (ben-collins) on 2007-01-08

Changed in linux-source-2.6.20:
importance:	Undecided → Medium

Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2007-01-09:

#10

The patch that caused this has been now reverted in Linus' tree.

Bug Watch Updater (bug-watch-updater) on 2007-01-09

Changed in linux:
status:	Unknown → Rejected

Revision history for this message

Ben Collins (ben-collins) wrote on 2007-01-10:

#11

Yep, saw that on the last pull. Thanks

Changed in linux-source-2.6.20:
status:	Confirmed → Fix Committed

Revision history for this message

Ken Lewis (kenlewis) wrote on 2007-01-24: A question for the maintainer:

#12

Ben,

Can you attach the patch to a comment here, list its git entry for your tree at kernel.org (I'm not expert with git but assume it can do that) or tell us when a new edition of the kernel will be available for download?

Thanks.
Ken.

Revision history for this message

Timo Jyrinki (timo-jyrinki) wrote on 2007-01-25:

#13

The patch is here:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=fea5f1e19611d94fbf3905875a427c4cb959cd06

Ben Collins (ben-collins) on 2007-02-03

Changed in linux-source-2.6.20:
status:	Fix Committed → Fix Released

Revision history for this message

Ken Lewis (kenlewis) wrote on 2007-02-04: Re: [Bug 78292] Re: Regression: system clock runs at twice the speed

#14

Ben Collins wrote:
> ** Changed in: linux-source-2.6.20 (Ubuntu)
> Status: Fix Committed => Fix Released
Confirmed fixed in linux-image-generic-2.6.20-6 (name may not be
formatted right).

Ken.Lewis

Bug Watch Updater (bug-watch-updater) on 2007-07-20

Changed in linux:
status:	Invalid → Fix Released

Bug Watch Updater (bug-watch-updater) on 2011-02-03

Changed in linux:
importance:	Unknown → Medium

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