For anyone finding this in the future, this is how I set up the out of
spec modes and set one to come up automatically.
Create the file /etc/X11/xorg.conf.d/90-monitor.conf (you may have to
create the directory)
Add the contents of the file as:
Section "Monitor"
Identifier "HDMI1"
VendorName "KJT
ModelName "78c5"
Option "PreferredMode" "2560x1440"
ModeLine "2560x1440" 241.50 2560 2608 2640 2720 1440 1442 1447 1481
+hsync +vsync
ModeLine "1920x1080" 172.80 1920 2040 2248 2576 1080 1081 1084 1118
-hsync +vsync
endSection
Modify the Identifier to match the name used by xrandr to show the connected
monitor. VendorName and ModelName are optional, or you can modify to match your
hardware. Use the modelines as appropriate for your monitor. You only need to
add modes that are over 165MHz (the first number after the mode name). The rest
of the modes will be added from the EDID. You must specify the PreferredMode or
it will not use overscan modes by default.
VendorName and ModelName can usually be found in Xorg.0.log. If the
ModeLines are not displayed in your Xorg.0.log file, you may wish to add
a "Device" section that has a line 'Option "ModeDebug" "True"' to get
more output from the modesetting module.
I'm still trying to figure out how to set the kernel frame buffer mode.
** Description changed:
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 130MHz. Some monitors, which worked before that patch via
+ 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 130MHz "at their
+ 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
+ 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.
+ 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
+ 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.
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1332220
Title:
Backport hdmi_portclock_limit regression fix patch to allow forcing
overclocking of DVI/HDMI signals
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