[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
Ubuntu 9.04 on netbook Acer AOA150 is also affected. Specifications of the machine are here: http://support.acer.com/acerpanam/netbook//Acer/AspireOneAOA150/AspireOneAOA150sp2.shtml gnome-display-properties shows proper resolution, and incorrect screen size, as seen on the attached screenshot. EDID information from xorg.log is: (II) intel(0): EDID vendor CMO, prod id 521 ** Attachment added: Screenshot-Display Preferences.png http://launchpadlibrarian.net/31845134/Screenshot-Display%20Preferences.png -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
there is no recent duplicate so that doesn't seem to confuse that many users and the value indicated in the correct one, there is no real reason to workaround it ** Changed in: gnome-control-center (Ubuntu) Assignee: (unassigned) = Ubuntu Desktop Bugs (desktop-bugs) Status: Triaged = Invalid -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
Wikipedia may shed some light on this issue: http://en.wikipedia.org/wiki/Viewable_image_size Perhaps the disclaimer should say you're reporting viewable image size. -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
Ok, wishlist seems good to me. I also think tricking those diagonals to report marketing data is not the best solution. By the way, we have lots of CRT monitors at work because it's a high school, which means we keep using very old computers (like PIII in departments) along newer ones in classrooms. Maybe adding a text disclaimer in the dialog about CRT monitor sizes could be done, something like: 'Tube monitors usually report a screen size smaller than what they have; e.g. 15 for a 17 monitor, or 13 for a 15' This might be a bad idea, though, as more research should be done (and I think string freeze is on). Also would be good to detect if the monitor is CRT or LCD, but I haven't any LCD at hand to try things (I'll try the one at the library, if the librarian allows me :-) Anyway I believe that Windows reports correct monitor sizes when one installs the .inf that comes with the monitor, so it's not much smarter than Linux or Xorg. -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
(sorry for delay in answering, Internet broke at home). Yes, I have these lines: $ cat /var/log/Xorg.0.log | grep Max H-Image (II) RADEON(0): Max H-Image Size [cm]: horiz.: 31 vert.: 23 [...] (II) RADEON(0): Max H-Image Size [cm]: horiz.: 31 vert.: 23 (same line is there 12 times). I did the math you said: diagonal D = sqrt(31² + 23²) / 2.54 = sqrt(961 + 529) / 2.54 = sqrt(1490) / 2.54 = 38.60 /2.54 = 15.19 inches so you're right, my monitor is 15! But it's really a 17 model (or so I believed all these years :-) No, seriously I was starting to disbelieve Pithagoras, so I directly measured the screen diagonal with a ruler. Measuring just the visible image in the tube (there are unused black borders around it), diagonal is 39,5 cm = 15,55 inches; measuring the whole of the glass (including those black borders), diagonal is 40,5 cm = 15,94 inches. So yeah, again 15.something. I also measured a 15 Phillips 105S CRT monitor to know if it really has 15, and its diagonal (again the whole of the glass) is 35,2 cm = 13,86 inches. Another 15, a Samsung SyncMaster 550s CRT monitor has a diagonal of 34,7 cm = 13,66 inches. Hmm, maybe vendors are (were) selling CRT monitor a bit smaller than what they advertised? A trick I noticed in all these diagonal values (in inches) is that truncating them (say turning 15,19 into 15) and adding 2 yields the (supposedly) correct value (in this case 15 + 2 = 17 inches). The same seems to work for those 15 inchers: 13.something -- 13, plus 2 = 15 inches. Don't know if this trick can be useful for showing more-or-less correct diagonals (at least for CRTs); surely TFT monitors are another world in this regard. Sorry for this long comment, just my discoveries -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
On the other hand, with LCD's they report correctly - my BenQ 24 monitor for example shows up with correct dimensions and matches what it's marketed as. Maybe marketing for CRT monitors use funny marketing? Anyway, several people have been reporting this issue; I'll leave this bug open to dupe against. I'm thinking fudging the numbers to match marketing data is maybe not the best solution, even if we could reliably distinguish between CRTs and LCDs, but maybe someone will have an idea. Anyway, moving to wishlist for now. ** Changed in: gnome-control-center (Ubuntu) Importance: Undecided = Wishlist Assignee: Bryce Harrington (bryceharrington) = (unassigned) Status: New = Triaged -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
Look in your Xorg.0.log for a line like: (II) RADEON(0): Max H-Image Size [cm]: horiz.: X vert.: Y That line is what your monitor is reporting of its true capabilities, and is provided directly from the monitor manufacturer. Now simply take X and Y, and then calculate the diagonal: D = sqrt(X^2 + Y^2) / (2.54 cm/in) Let me know what you get. -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
** Attachment added: Monitor_Resolution_Settings.png http://launchpadlibrarian.net/13096578/Monitor_Resolution_Settings.png -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
Oh, I forgot to say the monitor has a VGA connector, plugged into the PC to the VGA one. PC is a desktop with an ATI 9600 XT graphics card, AGP. The card has VGA, DVI and TV-out connectors, I just use the VGA one. Output from lspci -vvnn | grep ATI: [EMAIL PROTECTED]:~$ lspci -vvnn | grep ATI 02:00.0 VGA compatible controller [0300]: ATI Technologies Inc M10 NQ [Radeon Mobility 9600] [1002:4e51] (prog-if 00 [VGA controller]) 02:00.1 Display controller [0380]: ATI Technologies Inc M10 NQ [Radeon Mobility 9600] (Secondary) [1002:4e71] (the two lines are for VGA and DVI connections I think). -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 211409] Re: gnome-display-properties shows incorrect monitor size
** Changed in: gnome-control-center (Ubuntu) Assignee: (unassigned) = Bryce Harrington (bryceharrington) -- gnome-display-properties shows incorrect monitor size https://bugs.launchpad.net/bugs/211409 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
