Public bug reported:
After upgrading just the kernel from Ubuntu 12.04 to Quantal (linux-
image-3.5.0-5-generic 3.5.0-5.5) the external monitor connected to the
docking station is not detected either automatically or when I click
Displays | Detect Displays.
Computer is the ThinkPad X220 with Intel HD Graphics 3000 in ThinkPad
Mini Dock Series 3.
Monitor is the Samsung SyncMaster 223BW connected via DVI port on the
Mini Dock.
Looking in /var/log/Xorg.* I see big differences. Formerly:
[ 12125.063] (II) intel(0): EDID for output HDMI3
[ 12125.063] (II) intel(0): Manufacturer: SAM Model: 30d Serial#: 1296380466
[ 12125.063] (II) intel(0): Year: 2008 Week: 14
[ 12125.063] (II) intel(0): EDID Version: 1.3
[ 12125.063] (II) intel(0): Digital Display Input
[ 12125.063] (II) intel(0): Max Image Size [cm]: horiz.: 47 vert.: 30
[ 12125.063] (II) intel(0): Gamma: 2.20
[ 12125.064] (II) intel(0): DPMS capabilities: Off
[ 12125.064] (II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
[ 12125.064] (II) intel(0): First detailed timing is preferred mode
[ 12125.064] (II) intel(0): redX: 0.644 redY: 0.333 greenX: 0.286 greenY:
0.603
[ 12125.064] (II) intel(0): blueX: 0.152 blueY: 0.079 whiteX: 0.313 whiteY:
0.329
[ 12125.064] (II) intel(0): Supported established timings:
[ 12125.064] (II) intel(0): 720x400@70Hz
[ 12125.064] (II) intel(0): 640x480@60Hz
[ 12125.064] (II) intel(0): 640x480@67Hz
[ 12125.064] (II) intel(0): 640x480@72Hz
[ 12125.064] (II) intel(0): 640x480@75Hz
[ 12125.064] (II) intel(0): 800x600@56Hz
[ 12125.064] (II) intel(0): 800x600@60Hz
[ 12125.064] (II) intel(0): 800x600@72Hz
[ 12125.064] (II) intel(0): 800x600@75Hz
[ 12125.064] (II) intel(0): 832x624@75Hz
[ 12125.064] (II) intel(0): 1024x768@60Hz
[ 12125.064] (II) intel(0): 1024x768@70Hz
[ 12125.064] (II) intel(0): 1024x768@75Hz
[ 12125.064] (II) intel(0): 1280x1024@75Hz
[ 12125.064] (II) intel(0): 1152x864@75Hz
[ 12125.064] (II) intel(0): Manufacturer's mask: 0
[ 12125.064] (II) intel(0): Supported standard timings:
[ 12125.064] (II) intel(0): #0: hsize: 1680 vsize 1050 refresh: 60 vid: 179
[ 12125.064] (II) intel(0): #1: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
[ 12125.064] (II) intel(0): #2: hsize: 1280 vsize 960 refresh: 60 vid: 16513
[ 12125.064] (II) intel(0): #3: hsize: 1152 vsize 864 refresh: 75 vid: 20337
[ 12125.064] (II) intel(0): Supported detailed timing:
[ 12125.064] (II) intel(0): clock: 119.0 MHz Image Size: 474 x 296 mm
[ 12125.064] (II) intel(0): h_active: 1680 h_sync: 1728 h_sync_end 1760
h_blank_end 1840 h_border: 0
[ 12125.064] (II) intel(0): v_active: 1050 v_sync: 1053 v_sync_end 1059
v_blanking: 1080 v_border: 0
[ 12125.064] (II) intel(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81
kHz, PixClock max 145 MHz
[ 12125.064] (II) intel(0): Monitor name: SyncMaster
[ 12125.064] (II) intel(0): Serial No: HS3Q327803
[ 12125.064] (II) intel(0): EDID (in hex):
[ 12125.064] (II) intel(0): 00ffffffffffff004c2d0d033232454d
[ 12125.064] (II) intel(0): 0e120103802f1e782ad515a455499a27
[ 12125.064] (II) intel(0): 145054bfef80b30081808140714f0101
[ 12125.064] (II) intel(0): 0101010101017c2e90a0601a1e403020
[ 12125.064] (II) intel(0): 3600da281100001a000000fd00384b1e
[ 12125.064] (II) intel(0): 510e000a202020202020000000fc0053
[ 12125.064] (II) intel(0): 796e634d61737465720a2020000000ff
[ 12125.064] (II) intel(0): 00485333513332373830330a202000ca
[ 12125.064] (II) intel(0): Printing probed modes for output HDMI3
Now the VESA driver is used and doesn't detect a second monitor.
** Affects: xorg-server (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1028919
Title:
External monitor Samsung SyncMaster 223BW not detected
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