2008-08-31 06:41:18

by Dave Airlie

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]> wrote:
> On Saturday 30 August 2008, Bridgman, John wrote:
>>))I'm drowning in these errors:
>>))
>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo failed
>> status : 0x80076100 0x00000000
>>
>>I'm just going on the code in your email - can't view git until later today
>> - but in this case it seems like the timeouts were always happening and now
>> there is code to print an error message.
>>
>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested a
>> couple of times that the ideal solution would be to change the logic so
>> that the driver never times out while the chip is making progress (ie while
>> the number of slots available in the fifo is increasing, even if it hasn't
>> increased enough yet).
>>
> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4 tree and
> rebuilt it. There are no more errors being reported now by 2.6.27-rc4, and
> there were none without those 3 added lines prior to this, so it is rc5
> specific.

Hmm I'm just looking at the patches I put in for rc5, and there is no
functional difference to the
r200 codepath that I can see from those patches apart from the debug prints.

Can you get a clean -rc4 and apply just 54f961a628b737f66710eca0b0d95346645dd33e
to it.

See if you can get that to produce the errors, if it does, apply just
the drm info chunks, try again, if that works, try adding
the isync cntl chunk. and re-testing. I can't see how writing isync
cntl here would affect things though.

Dave.


2008-08-31 10:56:16

by Gene Heskett

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Sunday 31 August 2008, Dave Airlie wrote:
>On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]> wrote:
>> On Saturday 30 August 2008, Bridgman, John wrote:
>>>))I'm drowning in these errors:
>>>))
>>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo failed
>>> status : 0x80076100 0x00000000
>>>
>>>I'm just going on the code in your email - can't view git until later
>>> today - but in this case it seems like the timeouts were always happening
>>> and now there is code to print an error message.
>>>
>>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested a
>>> couple of times that the ideal solution would be to change the logic so
>>> that the driver never times out while the chip is making progress (ie
>>> while the number of slots available in the fifo is increasing, even if it
>>> hasn't increased enough yet).
>>
>> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4 tree
>> and rebuilt it. There are no more errors being reported now by
>> 2.6.27-rc4, and there were none without those 3 added lines prior to this,
>> so it is rc5 specific.
>
>Hmm I'm just looking at the patches I put in for rc5, and there is no
>functional difference to the
>r200 codepath that I can see from those patches apart from the debug prints.

Update: there were 3 of those in the log after I sent the denial msg.
======
Aug 30 23:48:34 coyote kernel: [ 7242.890000] [drm] wait for fifo failed status : 0x80076100 0x00000000
Aug 30 23:57:51 coyote kernel: [ 7800.370001] [drm] wait for fifo failed status : 0x8003C100 0x00000000
Aug 30 23:57:51 coyote kernel: [ 7800.458000] [drm] wait for fifo failed status : 0x8007C100 0x00000000
======
So this is a real, pre-rc5 problem, but without the reporting that enabled.

>Can you get a clean -rc4 and apply just
> 54f961a628b737f66710eca0b0d95346645dd33e to it.

Yes I can, but how do I get that specific patch? Or is that the git # for the
patch I first applied to -rc2, which added the firmware/radeon stuff? I'm
familiar with patch, but not on a first name basis with git, sorry.

So I'm going to do a bisect, my style. I will rebuild, starting with -rc3,
using only the -rcX patch and the firmware addition patch, which applied to
-rc3 as follows:
now applying [PATCH]radeon_cp-use-request_firmware

patching file drivers/gpu/drm/radeon/radeon_cp.c
patching file drivers/gpu/drm/radeon/radeon_drv.h
patching file drivers/gpu/drm/radeon/radeon_microcode.h
patching file firmware/Makefile
Hunk #1 FAILED at 34.
1 out of 1 hunk FAILED -- saving rejects to file firmware/Makefile.rej
===So I added that into the firmware/Makefile at line 28 by hand===
patching file firmware/WHENCE
Hunk #1 succeeded at 339 (offset -233 lines).
patching file firmware/radeon/R100_cp.bin.ihex
patching file firmware/radeon/R200_cp.bin.ihex
patching file firmware/radeon/R300_cp.bin.ihex
patching file firmware/radeon/R420_cp.bin.ihex
patching file firmware/radeon/R520_cp.bin.ihex
patching file firmware/radeon/RS600_cp.bin.ihex
patching file firmware/radeon/RS690_cp.bin.ihex

patch [PATCH]radeon_cp-use-request_firmware done

=== and I'm watching the build for errors===
It got past the MK_FW for those ok.
However there were 6 section miss-matches reported, and the suggested
addition to .config did not make it any noisier so I'm no smarter.
Now I've added those 3 reporter lines to radeon_cp.c, rebuilt again and
will reboot to -rc3 for effects, reporting after a few hours uptime.

Unless you have a better plan I can learn of course.

>See if you can get that to produce the errors, if it does, apply just
>the drm info chunks, try again, if that works, try adding
>the isync cntl chunk. and re-testing. I can't see how writing isync
>cntl here would affect things though.

>Dave.



--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
It is always the best policy to tell the truth, unless, of course,
you are an exceptionally good liar.
-- Jerome K. Jerome
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Equal bytes for women.

2008-08-31 11:57:28

by Gene Heskett

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Sunday 31 August 2008, Gene Heskett wrote:
>On Sunday 31 August 2008, Dave Airlie wrote:
>>On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]>
wrote:
>>> On Saturday 30 August 2008, Bridgman, John wrote:
>>>>))I'm drowning in these errors:
>>>>))
>>>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo
>>>> failed status : 0x80076100 0x00000000
>>>>
>>>>I'm just going on the code in your email - can't view git until later
>>>> today - but in this case it seems like the timeouts were always
>>>> happening and now there is code to print an error message.
>>>>
>>>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested a
>>>> couple of times that the ideal solution would be to change the logic so
>>>> that the driver never times out while the chip is making progress (ie
>>>> while the number of slots available in the fifo is increasing, even if
>>>> it hasn't increased enough yet).
>>>
>>> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4 tree
>>> and rebuilt it. There are no more errors being reported now by
>>> 2.6.27-rc4, and there were none without those 3 added lines prior to
>>> this, so it is rc5 specific.
>>
>>Hmm I'm just looking at the patches I put in for rc5, and there is no
>>functional difference to the
>>r200 codepath that I can see from those patches apart from the debug
>> prints.
>
>Update: there were 3 of those in the log after I sent the denial msg.
>======
>Aug 30 23:48:34 coyote kernel: [ 7242.890000] [drm] wait for fifo failed
> status : 0x80076100 0x00000000 Aug 30 23:57:51 coyote kernel: [
> 7800.370001] [drm] wait for fifo failed status : 0x8003C100 0x00000000 Aug
> 30 23:57:51 coyote kernel: [ 7800.458000] [drm] wait for fifo failed status
> : 0x8007C100 0x00000000 ======
>So this is a real, pre-rc5 problem, but without the reporting that enabled.
>
>>Can you get a clean -rc4 and apply just
>> 54f961a628b737f66710eca0b0d95346645dd33e to it.
>
>Yes I can, but how do I get that specific patch? Or is that the git # for
> the patch I first applied to -rc2, which added the firmware/radeon stuff?
> I'm familiar with patch, but not on a first name basis with git, sorry.
>
>So I'm going to do a bisect, my style. I will rebuild, starting with -rc3,
>using only the -rcX patch and the firmware addition patch, which applied to
>-rc3 as follows:
>now applying [PATCH]radeon_cp-use-request_firmware
>
>patching file drivers/gpu/drm/radeon/radeon_cp.c
>patching file drivers/gpu/drm/radeon/radeon_drv.h
>patching file drivers/gpu/drm/radeon/radeon_microcode.h
>patching file firmware/Makefile
>Hunk #1 FAILED at 34.
>1 out of 1 hunk FAILED -- saving rejects to file firmware/Makefile.rej
>===So I added that into the firmware/Makefile at line 28 by hand===
>patching file firmware/WHENCE
>Hunk #1 succeeded at 339 (offset -233 lines).
>patching file firmware/radeon/R100_cp.bin.ihex
>patching file firmware/radeon/R200_cp.bin.ihex
>patching file firmware/radeon/R300_cp.bin.ihex
>patching file firmware/radeon/R420_cp.bin.ihex
>patching file firmware/radeon/R520_cp.bin.ihex
>patching file firmware/radeon/RS600_cp.bin.ihex
>patching file firmware/radeon/RS690_cp.bin.ihex
>
>patch [PATCH]radeon_cp-use-request_firmware done
>
>=== and I'm watching the build for errors===
>It got past the MK_FW for those ok.
>However there were 6 section miss-matches reported, and the suggested
>addition to .config did not make it any noisier so I'm no smarter.
>Now I've added those 3 reporter lines to radeon_cp.c, rebuilt again and
>will reboot to -rc3 for effects, reporting after a few hours uptime.
>
>Unless you have a better plan I can learn of course.
>
Yeah I know, its bad form replying to one own messages, but 2.6.27-rc3 is
doing it too. So next I add the reporter to -rc1, without the firmware patch
as its a sure bet -rc2 will do it too. And will report back in a few hours.

Thanks Dave.

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-- Benjamin Franklin, 1759

2008-08-31 18:23:46

by Gene Heskett

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Sunday 31 August 2008, Gene Heskett wrote:
>On Sunday 31 August 2008, Dave Airlie wrote:
>>On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]>
wrote:
>>> On Saturday 30 August 2008, Bridgman, John wrote:
>>>>))I'm drowning in these errors:
>>>>))
>>>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo
>>>> failed status : 0x80076100 0x00000000
>>>>
>>>>I'm just going on the code in your email - can't view git until later
>>>> today - but in this case it seems like the timeouts were always
>>>> happening and now there is code to print an error message.
>>>>
>>>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested a
>>>> couple of times that the ideal solution would be to change the logic so
>>>> that the driver never times out while the chip is making progress (ie
>>>> while the number of slots available in the fifo is increasing, even if
>>>> it hasn't increased enough yet).
>>>
>>> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4 tree
>>> and rebuilt it. There are no more errors being reported now by
>>> 2.6.27-rc4, and there were none without those 3 added lines prior to
>>> this, so it is rc5 specific.
>>
>>Hmm I'm just looking at the patches I put in for rc5, and there is no
>>functional difference to the
>>r200 codepath that I can see from those patches apart from the debug
>> prints.
>
>Update: there were 3 of those in the log after I sent the denial msg.
>======
>Aug 30 23:48:34 coyote kernel: [ 7242.890000] [drm] wait for fifo failed
> status : 0x80076100 0x00000000 Aug 30 23:57:51 coyote kernel: [
> 7800.370001] [drm] wait for fifo failed status : 0x8003C100 0x00000000 Aug
> 30 23:57:51 coyote kernel: [ 7800.458000] [drm] wait for fifo failed status
> : 0x8007C100 0x00000000 ======
>So this is a real, pre-rc5 problem, but without the reporting that enabled.
>
>>Can you get a clean -rc4 and apply just
>> 54f961a628b737f66710eca0b0d95346645dd33e to it.
>
>Yes I can, but how do I get that specific patch? Or is that the git # for
> the patch I first applied to -rc2, which added the firmware/radeon stuff?
> I'm familiar with patch, but not on a first name basis with git, sorry.
>
>So I'm going to do a bisect, my style. I will rebuild, starting with -rc3,
>using only the -rcX patch and the firmware addition patch, which applied to
>-rc3 as follows:
>now applying [PATCH]radeon_cp-use-request_firmware
>
>patching file drivers/gpu/drm/radeon/radeon_cp.c
>patching file drivers/gpu/drm/radeon/radeon_drv.h
>patching file drivers/gpu/drm/radeon/radeon_microcode.h
>patching file firmware/Makefile
>Hunk #1 FAILED at 34.
>1 out of 1 hunk FAILED -- saving rejects to file firmware/Makefile.rej
>===So I added that into the firmware/Makefile at line 28 by hand===
>patching file firmware/WHENCE
>Hunk #1 succeeded at 339 (offset -233 lines).
>patching file firmware/radeon/R100_cp.bin.ihex
>patching file firmware/radeon/R200_cp.bin.ihex
>patching file firmware/radeon/R300_cp.bin.ihex
>patching file firmware/radeon/R420_cp.bin.ihex
>patching file firmware/radeon/R520_cp.bin.ihex
>patching file firmware/radeon/RS600_cp.bin.ihex
>patching file firmware/radeon/RS690_cp.bin.ihex
>
>patch [PATCH]radeon_cp-use-request_firmware done
>
>=== and I'm watching the build for errors===
>It got past the MK_FW for those ok.
>However there were 6 section miss-matches reported, and the suggested
>addition to .config did not make it any noisier so I'm no smarter.
>Now I've added those 3 reporter lines to radeon_cp.c, rebuilt again and
>will reboot to -rc3 for effects, reporting after a few hours uptime.

Ok Dave, I have chased it all the way back to rc1 by adding those 3 lines of
reporter, and at 2.6.27-rc1 it is still doing it. This is without the radeon
firmware patch, but since the microcode is still there in /lib/firmware, the
log says it is still being loaded.

I am beginning to think this is a very old bug, and this evening I will try
those 3 reporter lines added to 2.6.25.4 as I still have that src tree here.

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Have you seen the latest Japanese camera? Apparently it is so fast it can
photograph an American with his mouth shut!

2008-08-31 20:56:55

by Dave Airlie

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Mon, Sep 1, 2008 at 4:23 AM, Gene Heskett <[email protected]> wrote:
> On Sunday 31 August 2008, Gene Heskett wrote:
>>On Sunday 31 August 2008, Dave Airlie wrote:
>>>On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]>
> wrote:
>>>> On Saturday 30 August 2008, Bridgman, John wrote:
>>>>>))I'm drowning in these errors:
>>>>>))
>>>>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo
>>>>> failed status : 0x80076100 0x00000000
>>>>>
>>>>>I'm just going on the code in your email - can't view git until later
>>>>> today - but in this case it seems like the timeouts were always
>>>>> happening and now there is code to print an error message.
>>>>>
>>>>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested a
>>>>> couple of times that the ideal solution would be to change the logic so
>>>>> that the driver never times out while the chip is making progress (ie
>>>>> while the number of slots available in the fifo is increasing, even if
>>>>> it hasn't increased enough yet).
>>>>
>>>> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4 tree
>>>> and rebuilt it. There are no more errors being reported now by
>>>> 2.6.27-rc4, and there were none without those 3 added lines prior to
>>>> this, so it is rc5 specific.
>>>
>>>Hmm I'm just looking at the patches I put in for rc5, and there is no
>>>functional difference to the
>>>r200 codepath that I can see from those patches apart from the debug
>>> prints.
>>
>>Update: there were 3 of those in the log after I sent the denial msg.
>>======
>>Aug 30 23:48:34 coyote kernel: [ 7242.890000] [drm] wait for fifo failed
>> status : 0x80076100 0x00000000 Aug 30 23:57:51 coyote kernel: [
>> 7800.370001] [drm] wait for fifo failed status : 0x8003C100 0x00000000 Aug
>> 30 23:57:51 coyote kernel: [ 7800.458000] [drm] wait for fifo failed status
>> : 0x8007C100 0x00000000 ======
>>So this is a real, pre-rc5 problem, but without the reporting that enabled.
>>
>>>Can you get a clean -rc4 and apply just
>>> 54f961a628b737f66710eca0b0d95346645dd33e to it.
>>
>>Yes I can, but how do I get that specific patch? Or is that the git # for
>> the patch I first applied to -rc2, which added the firmware/radeon stuff?
>> I'm familiar with patch, but not on a first name basis with git, sorry.
>>
>>So I'm going to do a bisect, my style. I will rebuild, starting with -rc3,
>>using only the -rcX patch and the firmware addition patch, which applied to
>>-rc3 as follows:
>>now applying [PATCH]radeon_cp-use-request_firmware
>>
>>patching file drivers/gpu/drm/radeon/radeon_cp.c
>>patching file drivers/gpu/drm/radeon/radeon_drv.h
>>patching file drivers/gpu/drm/radeon/radeon_microcode.h
>>patching file firmware/Makefile
>>Hunk #1 FAILED at 34.
>>1 out of 1 hunk FAILED -- saving rejects to file firmware/Makefile.rej
>>===So I added that into the firmware/Makefile at line 28 by hand===
>>patching file firmware/WHENCE
>>Hunk #1 succeeded at 339 (offset -233 lines).
>>patching file firmware/radeon/R100_cp.bin.ihex
>>patching file firmware/radeon/R200_cp.bin.ihex
>>patching file firmware/radeon/R300_cp.bin.ihex
>>patching file firmware/radeon/R420_cp.bin.ihex
>>patching file firmware/radeon/R520_cp.bin.ihex
>>patching file firmware/radeon/RS600_cp.bin.ihex
>>patching file firmware/radeon/RS690_cp.bin.ihex
>>
>>patch [PATCH]radeon_cp-use-request_firmware done
>>
>>=== and I'm watching the build for errors===
>>It got past the MK_FW for those ok.
>>However there were 6 section miss-matches reported, and the suggested
>>addition to .config did not make it any noisier so I'm no smarter.
>>Now I've added those 3 reporter lines to radeon_cp.c, rebuilt again and
>>will reboot to -rc3 for effects, reporting after a few hours uptime.
>
> Ok Dave, I have chased it all the way back to rc1 by adding those 3 lines of
> reporter, and at 2.6.27-rc1 it is still doing it. This is without the radeon
> firmware patch, but since the microcode is still there in /lib/firmware, the
> log says it is still being loaded.
>
> I am beginning to think this is a very old bug, and this evening I will try
> those 3 reporter lines added to 2.6.25.4 as I still have that src tree here.
>

I think you've probably always had the problem, we just never reported
it before.

There are some timeouts that may be set too low somewhere in userspace
and we may need to adjust them.

Dave.

2008-09-01 01:02:21

by Gene Heskett

[permalink] [raw]
Subject: Re: Linux-2.6.27-rc5, drm errors in log

On Sunday 31 August 2008, Dave Airlie wrote:
>On Mon, Sep 1, 2008 at 4:23 AM, Gene Heskett <[email protected]> wrote:
>> On Sunday 31 August 2008, Gene Heskett wrote:
>>>On Sunday 31 August 2008, Dave Airlie wrote:
>>>>On Sun, Aug 31, 2008 at 12:19 PM, Gene Heskett <[email protected]>
>>
>> wrote:
>>>>> On Saturday 30 August 2008, Bridgman, John wrote:
>>>>>>))I'm drowning in these errors:
>>>>>>))
>>>>>>))Aug 30 13:21:05 coyote kernel: [14927.850078] [drm] wait for fifo
>>>>>> failed status : 0x80076100 0x00000000
>>>>>>
>>>>>>I'm just going on the code in your email - can't view git until later
>>>>>> today - but in this case it seems like the timeouts were always
>>>>>> happening and now there is code to print an error message.
>>>>>>
>>>>>>IIRC the usual fix is to bump the timeout but (Michael ?) has suggested
>>>>>> a couple of times that the ideal solution would be to change the logic
>>>>>> so that the driver never times out while the chip is making progress
>>>>>> (ie while the number of slots available in the fifo is increasing,
>>>>>> even if it hasn't increased enough yet).
>>>>>
>>>>> FWIW, I added the 3 lines that cause that printout to the 2.6.27-rc4
>>>>> tree and rebuilt it. There are no more errors being reported now by
>>>>> 2.6.27-rc4, and there were none without those 3 added lines prior to
>>>>> this, so it is rc5 specific.
>>>>
>>>>Hmm I'm just looking at the patches I put in for rc5, and there is no
>>>>functional difference to the
>>>>r200 codepath that I can see from those patches apart from the debug
>>>> prints.
>>>
>>>Update: there were 3 of those in the log after I sent the denial msg.
>>>======
>>>Aug 30 23:48:34 coyote kernel: [ 7242.890000] [drm] wait for fifo failed
>>> status : 0x80076100 0x00000000 Aug 30 23:57:51 coyote kernel: [
>>> 7800.370001] [drm] wait for fifo failed status : 0x8003C100 0x00000000
>>> Aug 30 23:57:51 coyote kernel: [ 7800.458000] [drm] wait for fifo failed
>>> status
>>>
>>> : 0x8007C100 0x00000000 ======
>>>
>>>So this is a real, pre-rc5 problem, but without the reporting that
>>> enabled.
>>>
>>>>Can you get a clean -rc4 and apply just
>>>> 54f961a628b737f66710eca0b0d95346645dd33e to it.
>>>
>>>Yes I can, but how do I get that specific patch? Or is that the git # for
>>> the patch I first applied to -rc2, which added the firmware/radeon stuff?
>>> I'm familiar with patch, but not on a first name basis with git, sorry.
>>>
>>>So I'm going to do a bisect, my style. I will rebuild, starting with
>>> -rc3, using only the -rcX patch and the firmware addition patch, which
>>> applied to -rc3 as follows:
>>>now applying [PATCH]radeon_cp-use-request_firmware
>>>
>>>patching file drivers/gpu/drm/radeon/radeon_cp.c
>>>patching file drivers/gpu/drm/radeon/radeon_drv.h
>>>patching file drivers/gpu/drm/radeon/radeon_microcode.h
>>>patching file firmware/Makefile
>>>Hunk #1 FAILED at 34.
>>>1 out of 1 hunk FAILED -- saving rejects to file firmware/Makefile.rej
>>>===So I added that into the firmware/Makefile at line 28 by hand===
>>>patching file firmware/WHENCE
>>>Hunk #1 succeeded at 339 (offset -233 lines).
>>>patching file firmware/radeon/R100_cp.bin.ihex
>>>patching file firmware/radeon/R200_cp.bin.ihex
>>>patching file firmware/radeon/R300_cp.bin.ihex
>>>patching file firmware/radeon/R420_cp.bin.ihex
>>>patching file firmware/radeon/R520_cp.bin.ihex
>>>patching file firmware/radeon/RS600_cp.bin.ihex
>>>patching file firmware/radeon/RS690_cp.bin.ihex
>>>
>>>patch [PATCH]radeon_cp-use-request_firmware done
>>>
>>>=== and I'm watching the build for errors===
>>>It got past the MK_FW for those ok.
>>>However there were 6 section miss-matches reported, and the suggested
>>>addition to .config did not make it any noisier so I'm no smarter.
>>>Now I've added those 3 reporter lines to radeon_cp.c, rebuilt again and
>>>will reboot to -rc3 for effects, reporting after a few hours uptime.
>>
>> Ok Dave, I have chased it all the way back to rc1 by adding those 3 lines
>> of reporter, and at 2.6.27-rc1 it is still doing it. This is without the
>> radeon firmware patch, but since the microcode is still there in
>> /lib/firmware, the log says it is still being loaded.
>>
>> I am beginning to think this is a very old bug, and this evening I will
>> try those 3 reporter lines added to 2.6.25.4 as I still have that src tree
>> here.
>
>I think you've probably always had the problem, we just never reported
>it before.

I'm thinking along those lines myself. And I'm assuming that -rc5 is 10x
worse because the added code in user space is now slow enough to trigger it
easier.

That also takes me back to one of my original Q's , and that was the question
about it using an R300 call on an RV280 card.

>There are some timeouts that may be set too low somewhere in userspace
>and we may need to adjust them.
>
>Dave.

Thanks Dave.

--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Live Free or Live in Massachusettes.