Same here. I am so far working with only one display because of this. Let me know if I can help in any way.
My system: Ubuntu 14.04LTS, Radeon X1050. In dmesg (The part that looks relevant): [ 1055.476139] show_signal_msg: 36 callbacks suppressed [ 1055.476142] compiz[14080]: segfault at 8 ip 00007fa84a7c7f47 sp 00007fff39071fc0 error 4 in r300_dri.so[7fa84a258000+8f8000] [ 1055.851684] perf: interrupt took too long (2502 > 2500), lowering kernel.perf_event_max_sample_rate to 79750 [ 1056.294922] compiz[14260]: segfault at 8 ip 00007ff1b2e00f47 sp 00007fffd3b98c60 error 4 in r300_dri.so[7ff1b2891000+8f8000] [ 1057.101796] compiz[14279]: segfault at 8 ip 00007fed2a127f47 sp 00007ffc3ddcb040 error 4 in r300_dri.so[7fed29bb8000+8f8000] [ 1057.918309] compiz[14416]: segfault at 8 ip 00007f6dff83bf47 sp 00007ffd7c287270 error 4 in r300_dri.so[7f6dff2cc000+8f8000] [ 1058.759363] compiz[14495]: segfault at 8 ip 00007f40ece94f47 sp 00007ffc35d65950 error 4 in r300_dri.so[7f40ec925000+8f8000] [ 1059.617702] compiz[14526]: segfault at 8 ip 00007f1e9cad1f47 sp 00007ffc26f3ec60 error 4 in r300_dri.so[7f1e9c562000+8f8000] -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1658695 Title: Segfault in r300_dri when 2 monitors connected - Ubuntu 16.04.1 Status in xorg package in Ubuntu: New Bug description: Hi, I try to connect 2 monitors on an Xpress 1100/1150 video card, VGA and DVI output. If I connect one monitor all is good, doesn't matter on which output it is connected. If I connect 2 monitors, in graphical mode, desktop is launched, background picture appears but nothing more: no desktop icons nor application launcher. The mouse cursor appears, goes normally from one screen to the other but no clic working. In console mode, output is on both monitors. In dmesg I see: compiz segfault at 8 ip NNNN sp other NNNN error 4 in r300_dri.so Ubuntu 16.04.1 LTS Thanks for your support Daniel ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35 Uname: Linux 4.4.0-59-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] Date: Mon Jan 23 14:53:13 2017 DistUpgraded: 2014-05-24 19:25:09,660 DEBUG enabling apt cron job DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: virtualbox, 5.0.24, 4.4.0-18-generic, x86_64: installed virtualbox, 5.0.24, 4.4.0-36-generic, x86_64: installed virtualbox, 5.0.24, 4.4.0-59-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] RS482/RS485 [Radeon Xpress 1100/1150] [1002:5974] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company DC5750 Microtower [103c:280a] Subsystem: Hewlett-Packard Company RS480 [Radeon Xpress 1150] (Secondary) [103c:280b] InstallationDate: Installed on 2013-03-26 (1398 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: Hewlett-Packard HP Compaq dc5750 Small Form Factor ProcEnviron: TERM=linux PATH=(custom, no user) LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-59-generic root=UUID=895610a5-c3a6-42dc-ac6a-d14e99ef6b67 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to xenial on 2014-05-24 (974 days ago) dmi.bios.date: 01/25/2007 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 786E3 v02.10 dmi.board.name: 0A64h dmi.board.vendor: Hewlett-Packard dmi.chassis.asset.tag: CZC8061JND dmi.chassis.type: 4 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr786E3v02.10:bd01/25/2007:svnHewlett-Packard:pnHPCompaqdc5750SmallFormFactor:pvr:rvnHewlett-Packard:rn0A64h:rvr:cvnHewlett-Packard:ct4:cvr: dmi.product.name: HP Compaq dc5750 Small Form Factor dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2 version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Mon Jan 23 12:59:48 2017 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input AT Translated Set 2 keyboard KEYBOARD, id 8 input ImPS/2 Logitech Wheel Mouse MOUSE, id 9 input HP WMI hotkeys KEYBOARD, id 10 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.4-0ubuntu0.2 xserver.video_driver: radeon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1658695/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
