[Bugme-new] [Bug 13462] New: Unused bands in intefb console and smaller 180x56 -> 128x48

[bugzilla-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=13462

           Summary: Unused bands in intefb console and smaller 180x56 ->
                    128x48
           Product: Drivers
           Version: 2.5
    Kernel Version: v2.6.30-rc8-5-gc9fb15f
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI)
        AssignedTo: drivers_video-dri at kernel-bugs.osdl.org
        ReportedBy: santi at agolina.net
                CC: keithp at keithp.com
        Regression: Yes


Created an attachment (id=21768)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=21768)
Xorg.0.log, just in case there is useful info

Hello,

  I've tested the code in latest linux-2.6.git (v2.6.30-rc8-13-gb87297f) and
I've found a regression. Now I have unused screen in the bottom and the right
of the screen, additionally the size of the console also change, 180x56 ->
128x48.

-Console: switching to colour frame buffer device 180x56
+Console: switching to colour frame buffer device 128x48

  I've bisected it down to:

commit c9fb15f60eb517c958dec64dca9357bf62bf2201
Author: Keith Packard <keithp at keithp.com>
Date:   Sun May 31 05:42:28 2009

    drm: Hook up DPMS property handling in drm_crtc.c. Add
drm_helper_connector_dpms.

    Making the drm_crtc.c code recognize the DPMS property and invoke the
    connector->dpms function doesn't remove any capability from the driver
while
    reducing code duplication.

    That just highlighted the problem with the existing DPMS functions which
    could turn off the connector, but failed to turn off any relevant crtcs.
The
    new drm_helper_connector_dpms function manages all of that, using the
    drm_helper-specific crtc and encoder dpms functions, automatically
computing
    the appropriate DPMS level for each object in the system.

    This fixes the current troubles in the i915 driver which left PLLs, pipes
    and planes running while in DPMS_OFF mode or even while they were unused.

    Signed-off-by: Keith Packard <keithp at keithp.com>
    Signed-off-by: Dave Airlie <airlied at redhat.com>

Also reverting this commit also fixes the issue. My machine is a Dell Latitude
E5400, with an intel card:

00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset
Integrated Graphics Controller (rev 07)

with an LVDS. Some DRM info from dmesg:

DRM Information from dmesg:
[    0.579953] [drm] Initialized drm 1.1.0 20060810
[    0.586016] [drm] MTRR allocation failed.  Graphics performance may suffer.
[    1.423615] [drm] TV-18: set mode NTSC 480i 0
[    1.610925] [drm] LVDS-8: set mode 1440x900 1a
[    1.991910] fb0: inteldrmfb frame buffer device
[    2.017771] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor
0
[   18.757526] [drm] TV-18: set mode NTSC 480i 0
[   18.898089] [drm] TV-18: set mode NTSC 480i 0
[   19.338302] [drm] TV-18: set mode NTSC 480i 0
[   19.478601] [drm] TV-18: set mode NTSC 480i 0
[   32.086362] [drm] TV-18: set mode NTSC 480i 0
[   32.226401] [drm] TV-18: set mode NTSC 480i 0
[   32.654244] [drm] TV-18: set mode NTSC 480i 0
[   32.795055] [drm] TV-18: set mode NTSC 480i 0
[   33.230331] [drm] TV-18: set mode NTSC 480i 0
[   33.370942] [drm] TV-18: set mode NTSC 480i 0

Thanks,
Santi

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