Look at section "My custom video mode is not effective" on "http://nouveau.freedesktop.org/wiki/TroubleShooting/":
xrandr --output DVI-I-1 --set 'scaling mode' None -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1124299 Title: Wrong vertical refresh with Nouveau Status in “xserver-xorg-video-nouveau” package in Ubuntu: New Status in “xserver-xorg-video-nouveau” package in Arch Linux: New Bug description: Hello, I'm using Linux Mint 14 MATE, 3.5.0-23 x64 with a NVIDIA GeForce GTX 460 video card and a ViewSonic VG1921wm monitor. Using the NVIDIA privative driver I can set the monitor resolution to 1440x900 @ 75Hz in Menu > Preferences > Monitors. Then with the monitor buttons I look in Information and it says that vertical frecuency is 74.8Hz, and when I set it to 1440x900 @ 60Hz, the monitor says that vertical frecuency is 59.9Hz, namely: all works well. But when I'm using Nouveau it has no effect, wathever I set in Menu > Preferences > Monitors (as user or as root, is the same) the information of my monitor always shows a vertical frecuency of 59.9Hz. My graphical system is crashing with some applications at fullscreen using Nouveau finally showing a "your x-system is bad configured" (or something like that) message, nevertheless I haven't configured anything else than the refresh rate in Menu > Preferences > Monitors since I installed Linux Mint, I don't know if it may be related. I've already reported this problem in the Linux Mint forum and they've linked me here. The thread is http://forums.linuxmint.com/viewtopic.php?f=59&t=125253 if your want to take a look. 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu *** Linux Mint 14 Nadia 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center *** I don't know if it's a concrete package bug or the nouveau driver is releated to the kernel... I'm not sure which package is failing. 3) What you expected to happen *** Vertical frecuency showed by my monitor should me the same is selected in Menu > Preferences > Monitors 4) What happened instead *** My monitor always shows 60 Hz as vertical refresh although I select 75 Hz in Linux Mint What can I do in order to get the real 1440x900@75Hz resolution with Nouveau? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1124299/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
