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Message #69649
[Bug 1311476] Re: Upgrade to Trusty breaks 2560x1440 over DVI on intel haswell
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1311476
Title:
Upgrade to Trusty breaks 2560x1440 over DVI on intel haswell
Status in “linux” package in Ubuntu:
Expired
Bug description:
After upgrading to Trusty, my Dell U2711 won't run at its native
2560x1440. Instead, resolution is limited to 1920x1200.
However, if I connect this monitor via displayport, it works fine; it
also worked fine in 13.10.
Some weird things: apparently, the driver thinks the DVI port is
actually an HDMI port. I found bugs #859389 (old), #890088 (mint,
nvidia not intel), and #980453 (also nvidia, also old) which also
refer to false recognition as an HDMI port.
I found a thread (in german)
http://forum.ubuntuusers.de/topic/2560x1440-funktioniert-ploetzlich-
nicht-mehr-d/ which sounds exactly like my problem.
Attempting to force the resolution with xrandr didn't work (and
resulted in some odd errors I can't interpret), but using the results
of "gtf 2560 1440 30.0" (i.e. 30fps not 60) at least temporarily
worked, but the display (predictably) looks pretty laggy.
I'm not sure what graphics driver is running (though I'm pretty sure it's the default for haswell) nor how to tell, but I'll reboot and generate a clean(ish) Xorg log and attach that.
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ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: eamon 4063 F.... pulseaudio
/dev/snd/pcmC1D0p: eamon 4063 F...m pulseaudio
/dev/snd/controlC0: eamon 4063 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=5b655402-10fe-491b-9452-910059fc3419
InstallationDate: Installed on 2013-10-28 (176 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
NonfreeKernelModules: wl
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
Tags: trusty
Uname: Linux 3.13.0-24-generic x86_64
UpgradeStatus: Upgraded to trusty on 2014-04-22 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/04/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.10
dmi.board.name: Z87E-ITX
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.:bvrP2.10:bd10/04/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ87E-ITX: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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