[Bug 83651] New: radeon: kernel returns invalid information about video connectors' status

[Bug 83651] New: radeon: kernel returns invalid information about video connectors' status

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=83651

            Bug ID: 83651
           Summary: radeon: kernel returns invalid information about video
                    connectors' status
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.16.1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: newgarry@mail.ru
        Regression: No

Information obtained from kernel sys subsystem about ATI HD 5650 card's
connectors status doesn't reflects real existing situation. That prevents
higher level systems using the obtained information from working correctly.

For example, systemd uses that information to decide what to do on lid close
event (related bug report,
https://bugs.freedesktop.org/show_bug.cgi?id=76267#c13).

My laptop have hybrid video configuration (Intel + discrete ATI). The discrete
ATI card is always powered off by init script via vgaswitcheroo interface on
system boot. There aren't external connected monitors.


Following is the valid report from kernel about the Intel card after system
boot:

# cat /sys/class/drm/card0-LVDS-1/status 
connected

# cat /sys/class/drm/card0-VGA-1/status 
disconnected


Following is the invalid report from kernel about the ATI card after system
boot:

# cat /sys/class/drm/card1-LVDS-2/status 
connected

# cat /sys/class/drm/card1-VGA-2/status 
connected

# cat /sys/class/drm/card1-HDMI-A-1/status 
disconnected


Report from vgaswitcheroo interface:

# cat /sys/kernel/debug/vgaswitcheroo/switch 
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Off:0000:01:00.0
2:DIS-Audio: :Off:0000:01:00.1


lspci:

# lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated
Graphics Controller (rev 18)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M] (rev ff)

# lspci -n | grep 0300
00:02.0 0300: 8086:0046 (rev 18)
01:00.0 0300: 1002:68c1 (rev ff)


Kernel: 3.16.1


Thank you in advance!

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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https://bugzilla.kernel.org/show_bug.cgi?id=83651

Alex Deucher <alexdeucher@gmail.com> changed:

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

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your dmesg output and xorg log.

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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https://bugzilla.kernel.org/show_bug.cgi?id=83651

--- Comment #2 from Garri <g.djavadyan@gmail.com> ---
Created attachment 149441
  --> https://bugzilla.kernel.org/attachment.cgi?id=149441&action=edit
journalctl -b -k

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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https://bugzilla.kernel.org/show_bug.cgi?id=83651

--- Comment #3 from Garri <g.djavadyan@gmail.com> ---
Created attachment 149451
  --> https://bugzilla.kernel.org/attachment.cgi?id=149451&action=edit
journalctl -b _EXE=/usr/bin/Xorg _PID=2217

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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--- Comment #4 from Garri <g.djavadyan@gmail.com> ---
Created attachment 149461
  --> https://bugzilla.kernel.org/attachment.cgi?id=149461&action=edit
journalctl -b _EXE=/usr/bin/Xorg _PID=7729

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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https://bugzilla.kernel.org/show_bug.cgi?id=83651

Renato <barbieri.renato@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |barbieri.renato@gmail.com

--- Comment #5 from Renato <barbieri.renato@gmail.com> ---
Hi there,

I've got the same problem and, as reported above, suspend on lid closing isn't
working.

Here are the reports about the INTEL and AMD card, respectively:


cat /sys/class/drm/card0-LVDS-1/status
connected

cat /sys/class/drm/card0-VGA-1/status 
disconnected

cat /sys/class/drm/card1-VGA-2/status 
disconnected

cat /sys/class/drm/card1-LVDS-2/status
connected

cat /sys/class/drm/card1-HDMI-A-1/status
disconnected

I'm on Archlinux, with 3.14.18-1-lts kernel.


Any ideas? Thanks!

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
The lid issue is more semantic.  The display is still connected even when the
lid is closed so it should still report as connected.  It's up to the desktop
environment to decide what to do when they get a lid event.

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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--- Comment #7 from Garri <g.djavadyan@gmail.com> ---
(In reply to Alex Deucher from comment #6)
> The lid issue is more semantic.  The display is still connected even when
> the lid is closed so it should still report as connected.  It's up to the
> desktop environment to decide what to do when they get a lid event.

Alex, is your reply addressed to the comment 5 or to the bug report generally?

Thanks.

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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--- Comment #8 from Alex Deucher <alexdeucher@gmail.com> ---
Comment 5 specifically.

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--- Comment #9 from Alex Deucher <alexdeucher@gmail.com> ---
Well, about lids in general.

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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--- Comment #10 from Garri <g.djavadyan@gmail.com> ---
Created attachment 154661
  --> https://bugzilla.kernel.org/attachment.cgi?id=154661&action=edit
dmesg_xorg_log.tgz

There are no problems when the hybrid graphics is disabled in BIOS.

# cat /sys/class/drm/card0-LVDS-1/status 
connected
# cat /sys/class/drm/card0-VGA-1/status 
disconnected
# cat /sys/class/drm/card0-HDMI-A-1/status 
disconnected

Reported information is correct. Suspend on LID close works fine. Kernel and
Xorg logs are attached.

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[Bug 83651] radeon: kernel returns invalid information about video connectors' status

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https://bugzilla.kernel.org/show_bug.cgi?id=83651

--- Comment #11 from Renato <barbieri.renato@gmail.com> ---
(In reply to Alex Deucher from comment #8)
> Comment 5 specifically.

I agree that it is up to the desktop environment, but, as stated in comment 1
if the kernel reports two screen attached, systemd wont't suspend  because it
thinks there's still a display that's active.

Anyway, the issue is specifically the wrong number of connected displays
detected by the kernel.

Or I'm missing something?

Cheers.

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