[Bug 114031] New: Radeon Kernel Mode Setting sets wrong mode on Acer Z5610

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=114031

            Bug ID: 114031
           Summary: Radeon Kernel Mode Setting sets wrong mode on Acer
                    Z5610
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.3.6
          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: massimo.burcheri@gmx.de
        Regression: No

This is an All-in-One PC, model Acer Z5610.

$ lspci |grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
RV730/M96-XT [Mobility Radeon HD 4670]

As of current kernel 4.3.6, all recent kernels beginning from >3.18.0 are
setting wrong KMS modes:

head -n1 /sys/class/drm/card0-LVDS-1/modes 
1680x1050

This should be the native 1980x1080 resolution.

Last kernel doing that right: 3.18.0




$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1400 x 1050, maximum 8192 x 8192
LVDS connected 1400x1050+0+0 (0x54) normal (normal left inverted right x axis y
axis) 0mm x 0mm
    Identifier: 0x51
    Timestamp:  24630
    Subpixel:   horizontal rgb
    Gamma:      1.0:1.0:1.0
    Brightness: 1.0
    Clones:    
    CRTC:       0
    CRTCs:      0 1
    Transform:  1.000000 0.000000 0.000000
                0.000000 1.000000 0.000000
                0.000000 0.000000 1.000000
               filter: 
    scaling mode: Full 
        supported: None, Full, Center, Full aspect
  1680x1050 (0x53) 146.250MHz -HSync +VSync
        h: width  1680 start 1784 end 1960 total 2240 skew    0 clock  65.29KHz
        v: height 1050 start 1053 end 1059 total 1089           clock  59.95Hz
  1400x1050 (0x54) 121.750MHz -HSync +VSync *current
        h: width  1400 start 1488 end 1632 total 1864 skew    0 clock  65.32KHz
        v: height 1050 start 1053 end 1057 total 1089           clock  59.98Hz
  1280x1024 (0x55) 109.000MHz -HSync +VSync
        h: width  1280 start 1368 end 1496 total 1712 skew    0 clock  63.67KHz
        v: height 1024 start 1027 end 1034 total 1063           clock  59.89Hz
  1440x900 (0x56) 106.500MHz -HSync +VSync
        h: width  1440 start 1528 end 1672 total 1904 skew    0 clock  55.93KHz
        v: height  900 start  903 end  909 total  934           clock  59.89Hz
  1280x960 (0x57) 101.250MHz -HSync +VSync
        h: width  1280 start 1360 end 1488 total 1696 skew    0 clock  59.70KHz
        v: height  960 start  963 end  967 total  996           clock  59.94Hz
  1280x854 (0x58) 89.250MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  53.12KHz
        v: height  854 start  857 end  867 total  887           clock  59.89Hz
  1280x800 (0x59) 83.500MHz -HSync +VSync
        h: width  1280 start 1352 end 1480 total 1680 skew    0 clock  49.70KHz
        v: height  800 start  803 end  809 total  831           clock  59.81Hz
  1280x720 (0x5a) 74.500MHz -HSync +VSync
        h: width  1280 start 1344 end 1472 total 1664 skew    0 clock  44.77KHz
        v: height  720 start  723 end  728 total  748           clock  59.86Hz
  1152x768 (0x5b) 71.750MHz -HSync +VSync
        h: width  1152 start 1216 end 1328 total 1504 skew    0 clock  47.71KHz
        v: height  768 start  771 end  781 total  798           clock  59.78Hz
  1024x768 (0x5c) 63.500MHz -HSync +VSync
        h: width  1024 start 1072 end 1176 total 1328 skew    0 clock  47.82KHz
        v: height  768 start  771 end  775 total  798           clock  59.92Hz
  800x600 (0x5d) 38.250MHz -HSync +VSync
        h: width   800 start  832 end  912 total 1024 skew    0 clock  37.35KHz
        v: height  600 start  603 end  607 total  624           clock  59.86Hz
  848x480 (0x5e) 31.500MHz -HSync +VSync
        h: width   848 start  872 end  952 total 1056 skew    0 clock  29.83KHz
        v: height  480 start  483 end  493 total  500           clock  59.66Hz
  720x480 (0x5f) 26.750MHz -HSync +VSync
        h: width   720 start  744 end  808 total  896 skew    0 clock  29.85KHz
        v: height  480 start  483 end  493 total  500           clock  59.71Hz
  640x480 (0x60) 23.750MHz -HSync +VSync
        h: width   640 start  664 end  720 total  800 skew    0 clock  29.69KHz
        v: height  480 start  483 end  487 total  500           clock  59.38Hz

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