[Bug 30813] New: Red tinge on LCD when using KMS on Radeon

Tue Oct 12 15:29:36 PDT 2010

https://bugs.freedesktop.org/show_bug.cgi?id=30813

           Summary: Red tinge on LCD when using KMS on Radeon
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: michaelh at juju.net.nz
         QAContact: xorg-team at lists.x.org

Hi there.  My Thinkpad R500 develops a red tinge on the right hand half of the
screen when using KMS.  The problem goes away if I use UMS and set NewPll=True
in xorg.conf.  The problem did not occur in Ubuntu Hardy and doesn't occur
under Windows 7.

The tinge is strange.  The left hand side of the screen is fine, but the right
hand side seems to have a red vertial banding as if the phase was slightly
wrong.  Note that whites are still white.  The problem can take a while (~30
minutes) to appear.  Changing the update rate between 50 and 60 Hz has no
effect.

Seen both under Unbuntu Lucid and Ubuntu Maverick.

My current setup under Maverick is:

X.Org X Server 1.9.0
Release Date: 2010-08-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-27-server x86_64 Ubuntu
Current Operating System: Linux crucis 2.6.36-996-generic #201010080908 SMP Fri
Oct 8 09:09:53 UTC 2010 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.36-996-generic
root=UUID=8888e0eb-2088-4a61-9fd8-56321be8f3a9 ro quiet splash
Build Date: 16 September 2010  06:18:41PM
xorg-server 2:1.9.0-0ubuntu7 (For technical support please see
http://www.ubuntu.com/support) 
Current version of pixman: 0.18.4

The kernel is the latest 2.6.36 from the Ubuntu kernel PPA.  The same problem
occurs under the Lucid kernel and 2.6.35.

The machine is a Lenovo Thinkpad R500 with a 15" 1680x1050 screen.

Xorg.0.log contains the following:

...
[    18.270] (II) RADEON(0): Creating default Display subsection in Screen
section
        "Default Screen Section" for depth/fbbpp 24/32
[    18.270] (==) RADEON(0): Depth 24, (--) framebuffer bpp 32
[    18.270] (II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp
pixmaps)
[    18.270] (==) RADEON(0): Default visual is TrueColor
[    18.270] (==) RADEON(0): RGB weight 888
[    18.270] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
[    18.270] (--) RADEON(0): Chipset: "ATI Mobility Radeon HD 3400 Series"
(ChipID = 0x95c4)
[    18.270] (II) RADEON(0): PCIE card detected
...
[    18.314] (II) RADEON(0): Manufacturer: LEN  Model: 4053  Serial#: 0
[    18.314] (II) RADEON(0): Year: 2007  Week: 0
[    18.314] (II) RADEON(0): EDID Version: 1.3
[    18.314] (II) RADEON(0): Digital Display Input
[    18.314] (II) RADEON(0): Max Image Size [cm]: horiz.: 33  vert.: 21
[    18.314] (II) RADEON(0): Gamma: 2.20
[    18.314] (II) RADEON(0): DPMS capabilities: StandBy Suspend Off
[    18.314] (II) RADEON(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4 
[    18.314] (II) RADEON(0): First detailed timing is preferred mode
[    18.314] (II) RADEON(0): redX: 0.569 redY: 0.332   greenX: 0.312 greenY:
0.544
[    18.314] (II) RADEON(0): blueX: 0.149 blueY: 0.132   whiteX: 0.313 whiteY:
0.329
[    18.314] (II) RADEON(0): Manufacturer's mask: 0
[    18.314] (II) RADEON(0): Supported detailed timing:
[    18.314] (II) RADEON(0): clock: 122.0 MHz   Image Size:  331 x 207 mm
[    18.314] (II) RADEON(0): h_active: 1680  h_sync: 1712  h_sync_end 1776
h_blank_end 1904 h_border: 0
[    18.314] (II) RADEON(0): v_active: 1050  v_sync: 1051  v_sync_end 1054
v_blanking: 1066 v_border: 0
[    18.314] (II) RADEON(0): Supported detailed timing:
[    18.314] (II) RADEON(0): clock: 101.7 MHz   Image Size:  331 x 207 mm
[    18.314] (II) RADEON(0): h_active: 1680  h_sync: 1712  h_sync_end 1776
h_blank_end 1904 h_border: 0
[    18.314] (II) RADEON(0): v_active: 1050  v_sync: 1051  v_sync_end 1054
v_blanking: 1066 v_border: 0
[    18.314] (II) RADEON(0): Unknown vendor-specific block f
[    18.314] (II) RADEON(0):  LTN154P3-L02
[    18.314] (II) RADEON(0): EDID (in hex):
...
[    18.314] (II) RADEON(0): Printing probed modes for output LVDS
[    18.314] (II) RADEON(0): Modeline "1680x1050"x60.1  122.00  1680 1712 1776
1904  1050 1051 1054 1066 -hsync -vsync (64.1 kHz)
[    18.314] (II) RADEON(0): Modeline "1680x1050"x50.1  101.67  1680 1712 1776
1904  1050 1051 1054 1066 -hsync -vsync (53.4 kHz)
[    18.314] (II) RADEON(0): Modeline "1400x1050"x60.0  121.75  1400 1488 1632
1864  1050 1053 1057 1089 -hsync +vsync (65.3 kHz)
[    18.314] (II) RADEON(0): Modeline "1280x1024"x59.9  109.00  1280 1368 1496
1712  1024 1027 1034 1063 -hsync +vsync (63.7 kHz)

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