Forwarding this bug from a Ubuntu user: https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/188792 EDID and ddcprobe show that resolution 1280x1024 is available from the monitor, but 1280x960 is selected instead: ubuntu@ubuntu:~$ sudo ddcprobe vbe: VESA 2.0 detected. oem: ATI RADEON 9200 memory: 131072kb mode: 800x600x16 mode: 1024x768x16 mode: 320x200x32k mode: 320x200x64k mode: 320x200x16m mode: 1600x1200x256 mode: 640x400x256 mode: 640x480x256 mode: 640x480x32k mode: 640x480x64k mode: 640x480x16m mode: 1600x1200x32k mode: 800x600x256 mode: 800x600x32k mode: 800x600x64k mode: 800x600x16m mode: 1600x1200x64k mode: 1024x768x256 mode: 1024x768x32k mode: 1024x768x64k mode: 1024x768x16m mode: 1280x1024x256 mode: 1280x1024x32k mode: 1280x1024x64k mode: 1280x1024x16m mode: 132x25 (text) mode: 132x43 (text) edid: edid: 1 3 id: 0302 eisa: MAG0302 serial: f900992f manufacture: 41 2004 input: sync on green, analog signal. screensize: 32 24 gamma: 1.270000 dpms: RGB, active off, suspend, standby timing: 720x400@70 Hz (VGA 640x400, IBM) timing: 640x480@75 Hz (VESA) timing: 800x600@60 Hz (VESA) timing: 800x600@75 Hz (VESA) timing: 1024x768@87 Hz Interlaced (8514A) timing: 1024x768@75 Hz (VESA) ctiming: 640x480@85 ctiming: 800x600@85 ctiming: 800x600@100 ctiming: 1024x768@85 ctiming: 1280x1024@60 dtiming: 640x480@100 dtiming: 800x600@85 monitorrange: 30-70, 50-160 monitorserial: FAIU4A039215 ubuntu@ubuntu:~$ xrandr Screen 0: minimum 320 x 200, current 1280 x 960, maximum 1600 x 1200 VGA-0 connected 1280x960+0+0 (normal left inverted right x axis y axis) 310mm x 230mm 1600x1024 60.2 1280x1024 60.0 60.0 1440x900 59.9 1280x960 60.0* 1360x768 59.8 1152x864 75.0 75.0 70.0 60.0 1024x768 85.0 85.0 75.1 75.0 70.1 60.0 832x624 74.6 800x600 100.0 85.0 85.1 85.1 72.2 75.0 60.3 56.2 640x480 100.0 85.0 85.0 72.8 75.0 60.0 59.9 720x400 85.0 70.1 640x400 85.1 640x350 85.1 DVI-0 disconnected (normal left inverted right x axis y axis) S-video disconnected (normal left inverted right x axis y axis) (II) RADEON(0): EDID vendor "MAG", prod id 770 (II) RADEON(0): Using hsync ranges from config file (II) RADEON(0): Using vrefresh ranges from config file (II) RADEON(0): Printing DDC gathered Modelines: (II) RADEON(0): Modeline "640x480"x0.0 40.50 640 656 720 800 480 481 484 506 -hsync -vsync (50.6 kHz) (II) RADEON(0): Modeline "800x600"x0.0 56.25 800 832 896 1048 600 601 604 631 +hsync +vsync (53.7 kHz) (II) RADEON(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz) (II) RADEON(0): Modeline "640x480"x0.0 25.20 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz) (II) RADEON(0): Modeline "720x400"x0.0 28.32 720 738 846 900 400 412 414 449 -hsync +vsync (31.5 kHz) (II) RADEON(0): Modeline "1024x768"x0.0 78.80 1024 1040 1136 1312 768 769 772 800 +hsync +vsync (60.1 kHz) (II) RADEON(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz) (II) RADEON(0): Modeline "800x600"x0.0 49.50 800 816 896 1056 600 601 604 625 +hsync +vsync (46.9 kHz) (II) RADEON(0): Modeline "640x480"x85.0 35.71 640 672 736 832 480 481 484 505 -hsync +vsync (42.9 kHz) (II) RADEON(0): Modeline "800x600"x85.0 56.55 800 840 928 1056 600 601 604 630 -hsync +vsync (53.5 kHz) (II) RADEON(0): Modeline "800x600"x100.0 68.18 800 848 936 1072 600 601 604 636 -hsync +vsync (63.6 kHz) (II) RADEON(0): Modeline "1024x768"x85.0 94.39 1024 1088 1200 1376 768 769 772 807 -hsync +vsync (68.6 kHz) (II) RADEON(0): Modeline "1280x1024"x60.0 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -hsync +vsync (63.6 kHz) (II) RADEON(0): Output: VGA-0, Detected Monitor Type: 1 (II) RADEON(0): EDID data from the display on output: VGA-0 ---------------------- (II) RADEON(0): Manufacturer: MAG Model: 302 Serial#: 39215 (II) RADEON(0): Year: 2004 Week: 41 (II) RADEON(0): EDID Version: 1.3 (II) RADEON(0): Analog Display Input, Input Voltage Level: 0.700/0.300 V (II) RADEON(0): Sync: Separate (II) RADEON(0): Max Image Size [cm]: horiz.: 32 vert.: 24 (II) RADEON(0): Gamma: 1.27 (II) RADEON(0): DPMS capabilities: StandBy Suspend Off; RGB/Color Display (II) RADEON(0): First detailed timing not preferred mode in violation of standard!(II) RADEON(0): redX: 0.618 redY: 0.349 greenX: 0.280 greenY: 0.605 (II) RADEON(0): blueX: 0.152 blueY: 0.063 whiteX: 0.281 whiteY: 0.310 (II) RADEON(0): Supported VESA Video Modes: (II) RADEON(0): 720x400@70Hz (II) RADEON(0): 640x480@60Hz (II) RADEON(0): 800x600@60Hz (II) RADEON(0): 800x600@75Hz (II) RADEON(0): 1024x768@60Hz (II) RADEON(0): 1024x768@75Hz (II) RADEON(0): Manufacturer's mask: 0 (II) RADEON(0): Supported Future Video Modes: (II) RADEON(0): #0: hsize: 640 vsize 480 refresh: 85 vid: 22833 (II) RADEON(0): #2: hsize: 800 vsize 600 refresh: 85 vid: 22853 (II) RADEON(0): #3: hsize: 800 vsize 600 refresh: 100 vid: 26693 (II) RADEON(0): #4: hsize: 1024 vsize 768 refresh: 85 vid: 22881 (II) RADEON(0): #5: hsize: 1280 vsize 1024 refresh: 60 vid: 32897 (II) RADEON(0): Supported additional Video Mode: (II) RADEON(0): clock: 40.5 MHz Image Size: 310 x 230 mm (II) RADEON(0): h_active: 640 h_sync: 656 h_sync_end 720 h_blank_end 800 h_border: 0 (II) RADEON(0): v_active: 480 v_sync: 481 v_sync_end 484 v_blanking: 506 v_border: 0 (II) RADEON(0): Supported additional Video Mode: (II) RADEON(0): clock: 56.2 MHz Image Size: 310 x 230 mm (II) RADEON(0): h_active: 800 h_sync: 832 h_sync_end 896 h_blank_end 1048 h_border: 0 (II) RADEON(0): v_active: 600 v_sync: 601 v_sync_end 604 v_blanking: 631 v_border: 0 (II) RADEON(0): Ranges: V min: 50 V max: 160 Hz, H min: 30 H max: 70 kHz, PixClock max 110 MHz (II) RADEON(0): Serial No: FAIU4A039215U (II) RADEON(0): EDID (in hex): (II) RADEON(0): 00ffffffffffff00342702032f990000 (II) RADEON(0): 290e01030820181be85c119e59479b27 (II) RADEON(0): 10484fa14a0031590101455945686159 (II) RADEON(0): 818000000000d20f80a020e01a101040 (II) RADEON(0): 130036e610000018f91520f830581f20 (II) RADEON(0): 2040130036e61000001e000000fd0032 (II) RADEON(0): a01e460b000a202020202020000000ff (II) RADEON(0): 00464149553441303339323135550029 in RADEONProbeOutputModes (II) RADEON(0): EDID vendor "MAG", prod id 770 (II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0. (II) RADEON(0): I2C device "DVI-0:ddc2" removed. (II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0. (II) RADEON(0): I2C device "DVI-0:ddc2" removed. (II) RADEON(0): I2C device "DVI-0:ddc2" registered at address 0xA0. (II) RADEON(0): I2C device "DVI-0:ddc2" removed. (II) RADEON(0): Output: DVI-0, Detected Monitor Type: 0 (II) RADEON(0): Output: S-video, Detected Monitor Type: 0 (II) RADEON(0): Output VGA-0 connected (II) RADEON(0): Output DVI-0 disconnected (II) RADEON(0): Output S-video disconnected (II) RADEON(0): Using fuzzy aspect match for initial modes (II) RADEON(0): Output VGA-0 using initial mode 1280x960 after xf86InitialConfiguration (**) RADEON(0): Display dimensions: (320, 240) mm (**) RADEON(0): DPI set to (126, 126) (II) Loading sub module "fb" (II) LoadModule: "fb" "Using fuzzy aspect match for initial modes" sounds suspicious. Also, it's showing dimensions as 310 x 230 mm in some places, and (320, 240) mm others. Rounding issue?