I have Kubuntu 14.10 with 3.16.0-28 kernel and the issue still exists. When I choose 3.11.0-20 during boot in Grub - 2560x1440@60Hz works perfectly without any xorg-config changing. But versions 3.11.0-22 and 3.16.0-28 support only up to 1920x1200@60Hz or something like that.
So, 3.11.0-20 is the last kernel version I've used, that worked correctly for high-resolution monitors with DVI-D connection. Does this regression still exist and not solved? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1332220 Title: Backport hdmi_portclock_limit regression fix patch to allow forcing overclocking of DVI/HDMI signals Status in linux package in Ubuntu: Fix Released Status in linux source package in Trusty: Fix Released Status in linux source package in Utopic: Fix Released Bug description: https://bugzilla.kernel.org/show_bug.cgi?id=72961 Summary: a patch included after upstream kernel 3.10 (and for ubuntu, whatever was used in the live iso) restricted DVI-D single link connections to 165MHz. Some monitors, which worked before that patch via an overclocked single link connection stopped working. This patch lets the user specify modes manually that are higher than 165MHz "at their own risk". I've tested the patch in the upstream bug against the current (as of 19 Jun 2014) git trusty kernel tree and everything seems to work fine. While the patch listed on the above bug won't apply with git-am, it will apply as patch -p0. I have it patched on my local branch, and can send a diff if it's needed. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-29-generic 3.13.0-29.53 ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jtate 2315 F.... pulseaudio jtate 2635 F.... pulseaudio /dev/snd/controlC0: jtate 2315 F.... pulseaudio jtate 2635 F.... pulseaudio CurrentDesktop: KDE Date: Thu Jun 19 13:30:52 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-06-16 (3 days ago) InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-30-generic root=/dev/mapper/kubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-30-generic N/A linux-backports-modules-3.13.0-30-generic N/A linux-firmware 1.127.2 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/23/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.30 dmi.board.name: Z97 Extreme4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.30:bd05/23/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ97Extreme4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1332220/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
