Bug 40851

Summary:

ATI BARTS DPMS: backlight doesn't stay off

Product:

xorg

Reporter:

Sebastian Kemper <sebastian_ml>

Component:

Driver/Radeon

Assignee:

xf86-video-ati maintainers <xorg-driver-ati>

Status:

RESOLVED DUPLICATE

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

CC:

hans, mblanchet, nissarin

Version:

7.6 (2010.12)

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

2011BRB_Reviewed

i915 platform:

i915 features:

Attachments:

Description	Flags
Xorg.0.log	none
dmesg.txt	none

Description Sebastian Kemper 2011-09-13 12:46:29 UTC

Hello everybody!

Current setup:
xorg-server-1.10.4
xf86-video-ati-6.14.2
Sapphire HD 6850 BARTS

When DPMS kicks in (no matter what mode, e.g. standby, suspend or off) my monitor's back-light switches off and then on again. The cycle repeats endlessly.

Example:

sleep 1; xset dpms force off

Then my monitor goes black and a message appears stating "no input signal". Then the back-light switches off. But after a second the monitor restarts as if the status had changed (e.g. signal had returned) and the back-light switches on again. Next comes the message again "no input signal". Repeat repeat repeat.

I also check if changing the power_method (dynpm vs. profile) makes a difference, but it doesn't.

I have a HD 3200 on-board. When that card is enabled instead, DPMS works fine.

Thanks for taking a look!

Kind regards
Sebastian

Comment 1 Sebastian Kemper 2011-09-13 12:56:48 UTC

Created attachment 51161 [details]
Xorg.0.log

Comment 2 Sebastian Kemper 2011-09-13 12:57:17 UTC

Created attachment 51162 [details]
dmesg.txt

Comment 3 Sebastian Kemper 2011-09-13 12:58:33 UTC

01:00.0 0300: 1002:6739 (prog-if 00 [VGA controller])
	Subsystem: 174b:e174
	Flags: bus master, fast devsel, latency 0, IRQ 42
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Memory at febe0000 (64-bit, non-prefetchable) [size=128K]
	I/O ports at e000 [size=256]
	Expansion ROM at febc0000 [disabled] [size=128K]
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Legacy Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Kernel driver in use: radeon
	Kernel modules: radeon

01:00.1 0403: 1002:aa88
	Subsystem: 174b:aa88
	Flags: bus master, fast devsel, latency 0, IRQ 41
	Memory at febbc000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 3
	Capabilities: [58] Express Legacy Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Kernel driver in use: HDA Intel

Comment 4 Alex Deucher 2011-09-13 13:12:32 UTC

It looks like you have your card attached to a TV.  Some TVs periodically probe the their inputs which causes hotplug connect/disconnects.  This should be fixed in kernel 3.1 and the latest 3.0.x stable images.  Might be a dupe of bug 38030.

Comment 5 Sebastian Kemper 2011-09-13 13:18:53 UTC

Hi Alex,

I'm using latest stable, 3.0.4. It is a TV, kind of, as it does have a DVB-T card integrated. But I'm connected to the DVI port of the monitor. And with my on-board HD 3200 the issue doesn't appear.

Thanks for the swift reply!

Kind regards
Sebastian

Comment 6 Alex Deucher 2011-09-13 14:24:59 UTC

(In reply to comment #5)
> Hi Alex,
> 
> I'm using latest stable, 3.0.4. It is a TV, kind of, as it does have a DVB-T
> card integrated. But I'm connected to the DVI port of the monitor. And with my
> on-board HD 3200 the issue doesn't appear.

Can you try 3.1?  I'm not sure the patches have made it into 3.0.4 (i.e., they may end up in 3.0.5).

Comment 7 Alex Deucher 2011-09-19 12:05:11 UTC

*** Bug 41019 has been marked as a duplicate of this bug. ***

Comment 8 Alex Deucher 2011-10-16 14:10:15 UTC

*** Bug 41839 has been marked as a duplicate of this bug. ***

Comment 9 Alex Deucher 2012-01-07 06:06:58 UTC


*** This bug has been marked as a duplicate of bug 30377 ***

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