xrandr query resets refresh rate to default setting

[Andrejs Hanins]

Hi,
   I faced this problem after upgrading from 14.04 to 14.10. Basically, when I switch display refresh rate using xrandr to some non-default value and then just run xrandr without any arguments, the rate resets to default. I can clearly see it as my TV is able to show current refresh rate. Also TV blinks after second xrandr invocation. So steps to reproduce are:

1. xrandr --output HDMI1 --mode 1920x1080 --rate 24 <-- TV switches to 24HZ and stays in this mode.
2. xrandr (or xrandr --nograb) <-- TV blinks and switches back to default 60HZ.

  The original problem was observed in Kodi (ex Xbmc) - it failed to enable (and still fails) 24HZ video refresh rate, I analyzed Kodi sources and found out that above mentioned steps are indeed used by Kodi to switch refresh rate. Note that fore some reason the switch to 50HZ refresh rate does NOT exibit the problem, but only to 24/25/30HZ (on my system).

Short summary about my system:
- 64Bit Ubuntu 14.10 (everything stock, Unity, all up-to-date)
- TV Phillips 47PFL7108
- CPU Intel(R) Core(TM) i7-4765T
- Video card (builtin) Intel® HD Graphics 4600

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xorg 1:7.7+7ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Sun Feb 15 21:14:35 2015
DistUpgraded: 2014-11-29 15:58:09,685 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Device [1458:d000]
InstallationDate: Installed on 2014-01-06 (405 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: GIGABYTE MSH81TN-00
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-30-generic root=UUID=606d0fae-4275-4eb2-ad9b-f730da28cbc5 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to utopic on 2014-11-29 (78 days ago)
dmi.bios.date: 10/15/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MSH81TN-00
dmi.board.vendor: GIGABYTE
dmi.board.version: 1.x
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.:bvrF2:bd10/15/2013:svnGIGABYTE:pnMSH81TN-00:pvr1.x:rvnGIGABYTE:rnMSH81TN-00:rvr1.x:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: MSH81TN-00
dmi.product.version: 1.x
dmi.sys.vendor: GIGABYTE
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Sun Feb 15 20:21:04 2015
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Video Bus KEYBOARD, id 7
 input Power Button KEYBOARD, id 8
 input Andrey’s Trackpad TOUCHPAD, id 9
 input Apple Wireless Keyboard KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 0
 vendor PHL
xserver.version: 2:1.16.0-1ubuntu1.2

[Andrejs Hanins (ahanins)]

The issue is now resolved after upgrading to Ubuntu 15.04

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 14.10 (utopic) reached end-of-life on July 23, 2015.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.