[Bug 16273] suspend/resume failure with radeon kms driver

[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273


Andrew Morton <akpm@linux-foundation.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akpm@linux-foundation.org
          Component|Hibernation/Suspend         |Video(DRI - non Intel)
         AssignedTo|power-management_other@kern |drivers_video-dri@kernel-bu
                   |el-bugs.osdl.org            |gs.osdl.org
            Product|Power Management            |Drivers




--- Comment #1 from Andrew Morton <akpm@linux-foundation.org>  2010-06-23 00:06:03 ---
Recategorised to DRI.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #2 from Alex Deucher <alexdeucher@gmail.com>  2010-06-23 17:19:23 ---
This looks like a dupe of bug 16140.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273





--- Comment #3 from Jose Marino <braket@hotmail.com>  2010-06-24 00:01:29 ---
Created an attachment (id=26921)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=26921)
dmesg after suspend/resume test with radeon.agpmode=-1

I don't see those error messages from bug 16140

In any case, I tested with radeon.agpmode=-1 and my problem is still there: the
computer freezes on resume with a black screen.

Also, boot parameter radeon.agpmode=-1 with echo core > /sys/power/pm_test
behaves as before: system resumes from suspend but I get a black screen. The
computer is still alive so I can capture a dmesg and reboot.
I attach the dmesg.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273


Jose Marino <braket@hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #26905|0                           |1
        is obsolete|                            |
  Attachment #26921|0                           |1
        is obsolete|                            |




--- Comment #4 from Jose Marino <braket@hotmail.com>  2010-07-05 18:34:43 ---
Created an attachment (id=27025)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=27025)
dmesg after suspend/resume test (2.6.35-rc4)

There has been some improvement with 2.6.35-rc4
With the rc4 the suspend/resume test works fine:
$ echo core > /sys/power/pm_test
$ echo mem > /sys/power/state

The laptop suspends for a few seconds and comes back fine. The display works
and everything seems ok. I attach the dmesg I captured after this test.

However, the actual suspend/resume still doesn't work. The symptoms are the
same as with rc3: the laptop locks up on resume.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273


Jose Marino <braket@hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #27025|0                           |1
        is obsolete|                            |




--- Comment #5 from Jose Marino <braket@hotmail.com>  2010-07-16 22:01:43 ---
Created an attachment (id=27132)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=27132)
dmesg after suspend/resume test (debug test)

I was able to get more info about this bug. 
I added an early return in the radeon resume routine with this patch applied on
top of f469461df6ff822f71b8737bda86eea20f16ff93

--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -799,6 +799,10 @@ int radeon_resume_kms(struct drm_device *dev)
        radeon_pm_resume(rdev);
        radeon_restore_bios_scratch_regs(rdev);

+       printk(KERN_INFO "radeon: **TEST** resume early\n");
+       release_console_sem();
+       return -1;
+
        /* turn on display hw */
        list_for_each_entry(connector, &dev->mode_config.connector_list, head)
{
                drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);


I booted this kernel and did a suspend/resume cycle, saved the dmesg and
rebooted. After the resume the display was black but I was able to save the
dmesg and start the reboot. The laptop locked up on reboot.

There are some new interesting error messages in the dmesg:
[drm:radeon_ring_write] *ERROR* radeon: writting more dword to ring than
expected !
[drm:r100_ring_test] *ERROR* radeon: ring test failed
(sracth(0x15E4)=0xFFFFFFFF)
[drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).
radeon 0000:01:00.0: failled initializing CP (-22).

I attach the full dmesg just in case.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273





--- Comment #6 from Jose Marino <braket@hotmail.com>  2010-09-13 22:29:41 ---
Update: I still see this problem with latest kernel v2.6.36-rc4

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273





--- Comment #7 from Jose Marino <braket@hotmail.com>  2010-11-21 03:14:33 ---
Created an attachment (id=37792)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=37792)
dmesg after suspend/resume (2.6.37-rc2+)

Current git kernel 2.6.37-rc2 (actually at
b86db4744230c94e480de56f1b7f31117edbf193) still has this issue.
I got another dmesg after a suspend/resume cycle by using the same patch as in
comment #5. There doesn't seem to be anything new but I'll attach it here just
in case.
These are the steps I take:
- boot patched kernel (console only, no X)
- run this:
echo mem > /sys/power/state ; dmesg > dmesg.log ; sync ; sync ; reboot

The laptop survives the suspend/resume (with a black screen) and writes the
dmesg to file but hangs on reboot.

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[Bug 16273] suspend/resume failure with radeon kms driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16273


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|                            |OBSOLETE




--- Comment #8 from Alan <alan@lxorguk.ukuu.org.uk>  2012-08-09 13:59:44 ---
The driver has changed so much that this bug report is really obsolete. If you
see the problem with a modern (3.2/4/5 kernel) feel free to update it

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