[Bug 83168] New: No display after suspend to RAM

[Bug 83168] New: No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

          Priority: medium
            Bug ID: 83168
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: No display after suspend to RAM
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 105362
  --> https://bugs.freedesktop.org/attachment.cgi?id=105362&action=edit
the kernel log

When Linux resumes after suspension to RAM, I get no display until next  
boot, but the backlight is on. I think this was true since I started     
using this distro, but I rarely tried to use suspend.                   
This happens invariantly to Xorg.                                       
Although my hardware is 64-bit, I use a 32-bit Linux.                   

Software versions:                                                      

* Linux 3.16.1                                                          

* libdrm 2.4.56                                                         

* mesa 10.2.6                                                           

* xf86-video-nouveau 1.0.10                                             

nouveau reports errors like these to kernel log when the display should 
turn back on:                                                           

[  153.783362] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00001e00 FAULT
at 0x6813c8
[  153.788735] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0x00002e00 FAULT
at 0x6813c8
[  153.791840] nouveau E[    PBUS][0000:01:00.0] MMIO write of 0xf5153d80 FAULT
at 0x6813c8

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[Bug 83168] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #1 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
lspci output:
VGA compatible controller: NVIDIA Corporation G72M [Quadro NVS 110M/GeForce Go
7300] (rev a1) (prog-if 00 [VGA controller])

dmesg | grep -i chipset
[    0.965969] nouveau  [  DEVICE][0000:01:00.0] Chipset: G72 (NV46)


Do I have to take a MMIO dump?

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|No display after suspend to |[NV46] No display after
                   |RAM                         |suspend to RAM

--- Comment #2 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Has any kernel version worked for you? i.e. is this a recent regression, or was
it always like this (or even worse)?

0x6813c8 = PRMDIO.PAL_INDEX

The 680* ones are in PRAMDAC but not documented in envytools...

Weird that the core frequency gets detected as 200 after resume instead of 222
as it was on start...

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #3 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to comment #2)
> Has any kernel version worked for you? i.e. is this a recent regression, or
> was it always like this (or even worse)?
> 
> 0x6813c8 = PRMDIO.PAL_INDEX
> 
> The 680* ones are in PRAMDAC but not documented in envytools...
> 
> Weird that the core frequency gets detected as 200 after resume instead of
> 222 as it was on start...

(In reply to comment #2)
> Has any kernel version worked for you? i.e. is this a recent regression, or
> was it always like this (or even worse)?
> 
> 0x6813c8 = PRMDIO.PAL_INDEX
> 
> The 680* ones are in PRAMDAC but not documented in envytools...
> 
> Weird that the core frequency gets detected as 200 after resume instead of
> 222 as it was on start...

I think this was like it is for a few months, it isn't a recent          
regression.

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #4 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to comment #3)
> I think this was like it is for a few months, it isn't a recent          
> regression.

Is that another way of saying that it was working fine a few months ago? Any
idea what kernel worked?

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #5 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to comment #4)
> (In reply to comment #3)
> > I think this was like it is for a few months, it isn't a recent          
> > regression.
> 
> Is that another way of saying that it was working fine a few months ago? Any
> idea what kernel worked?

No, I'm sorry for not being clear, I don't think it ever worked fine since I
switched to Archlinux from Debian sometime in April.

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #6 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to comment #5)
> (In reply to comment #4)
> > (In reply to comment #3)
> > > I think this was like it is for a few months, it isn't a recent          
> > > regression.
> > 
> > Is that another way of saying that it was working fine a few months ago? Any
> > idea what kernel worked?
> 
> No, I'm sorry for not being clear, I don't think it ever worked fine since I
> switched to Archlinux from Debian sometime in April.

So... it worked in debian. What linux kernel was that with?

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

[-- Attachment #1.1: Type: text/plain, Size: 782 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #7 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to comment #6)
> (In reply to comment #5)
> > (In reply to comment #4)
> > > (In reply to comment #3)
> > > > I think this was like it is for a few months, it isn't a recent          
> > > > regression.
> > > 
> > > Is that another way of saying that it was working fine a few months ago? Any
> > > idea what kernel worked?
> > 
> > No, I'm sorry for not being clear, I don't think it ever worked fine since I
> > switched to Archlinux from Debian sometime in April.
> 
> So... it worked in debian. What linux kernel was that with?

Sorry, I don't remember.

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #8 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to comment #7)
> (In reply to comment #6)
> > So... it worked in debian. What linux kernel was that with?
> 
> Sorry, I don't remember.

OK. Well, the most likely way for you to get this resolved is to identify the
kernel commit that caused the issue. In order to do that you need to find a
kernel version that worked fine. Good candidates to try out are

3.2
3.6
3.9

(IIRC 3.2 is what one of the debian versions likes to use, 3.6 is before 3.7
which had a ton of changes, and 3.10 had a bunch as well iirc.) If any of those
works, you need to do a bisect between that version and whatever the earliest
kernel you're aware of that *doesn't* work. Hopefully it won't be some
mega-change-everything commit.

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #9 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I built and installed linux 3.2 and it also didn't give a display after
suspend.
I took a kernel log again while the display didn't work, and it seems that
Nouveau didn't make any errors!? I'll upload it as linux3.2_log.txt.
Maybe I should try installing some stock, current distro to see if the problem
is present there too.

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

--- Comment #10 from Neven Sajko <nsajko-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 105515
  --> https://bugs.freedesktop.org/attachment.cgi?id=105515&action=edit
kernel log from linux 3.2

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[Bug 83168] [NV46] No display after suspend to RAM

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=83168

Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #11 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
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