Public bug reported: I have 3 LCD panels attached via straight DisplayPort cables (no daisy chaining, no DVI-DP converters and so on) to the FirePro V7900, which has 4 DisplayPort sockets.
One of the panels will often not come up when screens are DPMS-suspended (xset dpms force off, or by the screensaver). The panel will then say "No signal", but the card still thinks it is enabled and working (as verified in AMDCCCLE). It is sometimes possible make it work again by cycling a few times "xset dpms force off" and then pressing a key to turn screens on. It is always the same panel which has troubles, but it is port-bound (I tried exchaning the screens physically; it is the port numbered "3" in amdcccle, the other two being 1 and 2), not screen- bound. Sometimes the screen also just flickers, showing what it should only intermittently. Restarting X fixes the issue (but terminates the session) most the time. The open-source driver does not suffer from this issue at all. The fglrx driver has had this issue since as long as I remember (2 or 3 years). ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: fglrx-updates 2:13.350.1-0ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic x86_64 NonfreeKernelModules: fglrx .tmp.unity.support.test.0: ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,resize,move,place,snap,gnomecompat,mousepoll,session,regex,wall,imgpng,grid,vpswitch,animation,expo,ezoom,workarounds,unitymtgrabhandles,fade,scale,unityshell] CompositorRunning: None CurrentDesktop: LXDE Date: Wed Aug 27 22:42:24 2014 DistUpgraded: 2012-03-12 13:59:22,955 DEBUG icon theme changed, re-reading DistroCodename: trusty DistroVariant: ubuntu GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Cayman PRO GL [FirePro V7900] [1002:6704] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:2b0c] MachineType: System manufacturer System Product Name ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=3cc5f6b9-69d1-4bb6-a9d0-93d506786ed9 ro nosplash radeon.dpm=1 nosplash radeon.dpm=1 SourcePackage: fglrx-installer-updates UpgradeStatus: Upgraded to trusty on 2012-03-12 (898 days ago) dmi.bios.date: 10/03/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0604 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P9X79 DELUXE dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0604:bd10/03/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP9X79DELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer version.compiz: compiz 1:0.9.11.1+14.04.20140701-0ubuntu1 version.fglrx-installer: fglrx-installer N/A version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1 version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A xserver.bootTime: Wed Aug 27 22:39:56 2014 xserver.configfile: /etc/X11/xorg.conf xserver.errors: AIGLX error: failed to open /usr/X11R6/lib64/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib64/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] AIGLX error: failed to open /usr/lib64/dri/fglrx_dri.so, error[/usr/lib64/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] AIGLX error: failed to open /usr/X11R6/lib/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory] xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.15.1-0ubuntu2 xserver.video_driver: fglrx ** Affects: fglrx-installer-updates (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug possible-manual-nvidia-install trusty ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer-updates in Ubuntu. https://bugs.launchpad.net/bugs/1362326 Title: LCD panel sometimes says "No signal" and is blank, the driver thinks it is active To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer-updates/+bug/1362326/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp