Public bug reported: Binary package hint: xserver-xorg-video-intel
I have a T410 that I want to use for a presentation. Because the built-in LCD has a higher resolution (1440x900) than the projector, I want to set the LCD resolution to something lower (likely 1024x768), and then mirror its contents on the projector. The problem I run in to is that when I set the resolution on the LCD to 1024x768, the screen contents are stretched to fit the entire screen. Since the aspect ratios differ (4:3 for the projector, and 16:10 for the LCD), this display is distorted on the LCD. I've tried changing the scaling mode with xrandr, as follows: $ xrandr --output LVDS1 --set "scaling mode" "Center" But that does not fix the problem. While it does not report any errors (either on the console, or in Xorg.0.log), it also does not change how the display. This is true despite the fact that "xrandr --prop" reports that the scaling mode has been changed. $ xrandr --prop Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 VGA1 disconnected (normal left inverted right x axis y axis) LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm x 190mm EDID: 00ffffffffffff0030ae364000000000 00130103801e1378eaef259458568a29 24505400000001010101010101010101 0101010101018a25a02051841a303040 360030be100000195e1fa02051841a30 3040360030be100000190000000f0095 0a32950a2816090030e47302000000fe 004c503134315750332d544c413100ab BACKLIGHT: 13 (0x0000000d) range: (0,15) Backlight: 13 (0x0000000d) range: (0,15) scaling mode: Center supported: None Full Center Full aspect 1440x900 60.1 + 59.9 50.2 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0* 800x600 60.3 56.2 640x480 59.9 HDMI1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 519mm x 324mm EDID: 00ffffffffffff0010ac26a053415232 2411010380342178ee9bb5a95434ae25 135054a54b008180a940714fb3000101 010101010101283c80a070b023403020 360007442100001a000000ff00474d35 30343739363252415320000000fc0044 454c4c323430375746504843000000fd 00384c1e5311000a202020202020004c 1920x1200 60.0 + 1600x1200 60.0 1680x1050 60.0 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0* 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 DP1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) HDMI3 disconnected (normal left inverted right x axis y axis) DP2 disconnected (normal left inverted right x axis y axis) DP3 disconnected (normal left inverted right x axis y axis) Note that this bug report is similar to 458571, in that both deal with scaling mode on Intel graphics. However, in that bug report, the above command fixes the problem. (In case the xrandr information about HDMI1 is confusing, I should note that I'm testing this while using a large LCD as the external display, since I don't have a projector handy.) There are a couple of web pages [1][2] that report that this issue might be resolved in version 2.9.1 of the Intel graphics driver. But that seems not to be the issue here, as I'm running... $ lsb_release -rd Description: Ubuntu 10.04 LTS Release: 10.04 $ apt-cache policy xserver-xorg-video-intel xserver-xorg-video-intel: Installed: 2:2.11.0-1ubuntu1~xup Candidate: 2:2.11.0-1ubuntu1~xup Version table: *** 2:2.11.0-1ubuntu1~xup 0 100 /var/lib/dpkg/status 2:2.9.1-3ubuntu5 0 500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages [1] http://ubuntuforums.org/showthread.php?t=1400943 [2] http://www.linuxquestions.org/questions/linux-software-2/aspect-ratio-scaling-with-intel-gpus-and-linux-793488/ ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New -- unable to change scaling mode (thinkpad t410, lucid, intel arrandale graphics) https://bugs.launchpad.net/bugs/601370 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp