Bug 21652

Looks like perhaps the same issue as reported in this bug:

https://bugzilla.kernel.org/show_bug.cgi?id=21952

On Friday, November 19, 2010, Alex Deucher wrote:
> On Thu, Nov 18, 2010 at 7:47 PM, Mark Lord <kernel@teksavvy.com> wrote:
> > On 10-11-18 06:50 PM, Rafael J. Wysocki wrote:
> >>
> >> Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=21652
> >> Subject         : several problems with intel graphics since 2.6.36
> >> Submitter       : Norbert Preining<preining@logic.at>
> >> Date            : 2010-10-27 14:32 (23 days old)
> >
> > That one is interesting to me.. I suspect it may be the same cause
> > as for https://bugzilla.kernel.org/show_bug.cgi?id=21952
> >
> > I have one of those Samsung (N210) Netbooks here: works fine with 2.6.34
> and
> > earlier,
> > but fails to come out of suspend on 2.6.35/2.6.36 (haven't tried 2.6.37).
> >
> > So perhaps add 21952 to the list, or link it to the 21652
> > (kind of amusing how similar the bug numbers are..).
> >
> >
> > My non-Intel graphics notebook (has ATI X1400 graphics) also has a resume
> > regression with 2.6.36.  But it does work fine with 2.6.35 (and earlier,
> > back many years).  As a result, I'm stuck with 2.6.35 for the time being,
> > and lack the time for a concerted debug effort on 2.6.36+ right now.
> >
> 
> Can you bisect?  Does this patch help?
> 
> diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
> index 8e421f6..05efb5b 100644
> --- a/drivers/gpu/drm/radeon/atom.c
> +++ b/drivers/gpu/drm/radeon/atom.c
> @@ -112,6 +112,7 @@ static uint32_t atom_iio_execute(struct
> atom_context *ctx, int base,
>                         base += 3;
>                         break;
>                 case ATOM_IIO_WRITE:
> +                       (void)ctx->card->ioreg_read(ctx->card, CU16(base +
> 1));
>                         ctx->card->ioreg_write(ctx->card, CU16(base + 1),
>                         temp);
>                         base += 3;
>                         break;
>

That's better --> it now comes out of suspend, but slowly due to this (2.6.36):

[   98.498636] [drm] radeon: 1 quad pipes, 1 z pipes initialized.
[   98.505748] [drm] PCIE GART of 512M enabled (table at 0x00040000).
[   98.505793] [drm] radeon: ring at 0x0000000008000000
[   98.505827] [drm] ring test succeeded in 10 usecs
[   98.505842] [drm] ib test succeeded in 0 usecs
...
[  103.506664] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting
[  103.506668] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E576 (len 105, WS 12, PS 8) @ 0xE5C4
[  109.136664] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting
[  109.136667] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing ECD2 (len 86, WS 4, PS 0) @ 0xED05
[  114.139996] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting
[  114.139999] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E576 (len 105, WS 12, PS 8) @ 0xE5C4
[  114.210130] PM: resume of devices complete after 15718.438 msecs

I've been noticing those same errors from time to time on 2.6.35 as well, but have been trying to ignore them until now.  :)

Hi there,

yes, some problems remain (in the order of my original email):
- suspend seems to be more stable by now, I am trying to check that

- flickering of the display is definitely much better or completely gone

- screen redraw problem: still present, I attach a screenshot of parts of my
  desktop when it happens. It can easily reproduce that with xpdf.

- external monitor disconnect detection: cannot test at the moment

Thanks and all the best

Norbert

Created attachment 37862 [details]
Screenshot of screen redraw problem

Ok, one more comment: suspend is still not working as expected, I had this moment a black screen and no reaction (not even sysrq) while, as reported, this didn't happen (or very very rarely) with earlier versions (see original email).

Norbert

Updates:
- flickering of display is gone

- screen redraw problem I can still 100% reproduce by starting xpdf (all in Debian/unstable) and move another window *over* the xpdf window. This creates vertical stripes on the xterm I am moving.

- suspend: feeling is that it is slightly better, but still quite often the screen is not turned on and everything hangs, only 4sec hard reset helps.

Norbert

Following the reminder email I reconfirm my observations from Comment #7

reconfirmed my observations from comment #7, running rc8

Whats the status of this on 2.6.38.y? (or 2.6.39-rc*)

*ping*

Bug reporter seems to have disappeared, closing. If this is still an issue on 3.3, please reopen this bug.

Also, it's a radeon issue afaict.

(In reply to comment #13)
> Also, it's a radeon issue afaict.

AFAICT Norbert's original report was for Intel, Mark's problem was unrelated.

Oh dear, sorry I've missed that. Anyway, still closing because the bug reporter seems to have disappeared.

Agreed, sorry, I missed the ping emails. I am running 3.3 or so and most of these problems are gone, but there is a new one I reported already with details, hangcheck timer elapsed, see http://marc.info/?l=linux-kernel&m=133040184619910&w=2

Closing this bug is fine