The output of those commands are: 1.2.13 and 08/08/2016. I can't test the same configuration that I originally tested for another week, but on another 1680x1050 monitor it did work, eventually. I had to restart lightdm several times because things happened like the mouse click no longer working, once when I changed the resolution it flipped everything sideways, and the mouse started moving extraordinarily slowly and the desktop was unusable.
My issue is that there's a more severe bug with the brightness control after resume in the newer BIOS and its predecessor, so I can't use it (see http://en.community.dell.com/techcenter/os- applications/f/4613/p/19985875/20927410#20927410). Dell's official response is that they are aware of it, but they clearly aren't fixing it since they have released a second BIOS with the same bug. If it's purely a BIOS issue, why does the modeset driver have this screen resolution problem and not the intel driver? -- 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/1618423 Title: Modesetting driver cannot handle different display resolutions for two monitors Status in xorg package in Ubuntu: Incomplete Bug description: I have an external 1920x1080 monitor attached to my laptop, which has a 3840x2160 display. When I run them both at their native resolutions, the laptop display only works in the top quarter of the desktop, except for the unity launcher and unity top bar. Anything that leaves the top quarter leaves trails and flickers awfully (see attached image, which shows everything except the flickering). I also tried it with the laptop on 2560x1440 (I had to add it manually because of a a separate bug where the modesetting driver limits the max vertical refresh frequency of default modelines to 60 Hz) and exactly the same thing happens (although the geometry isn't one quarter any more). It works fine with the intel driver, but not the modesetting driver, so it seems to be an xserver issue rather than a unity issue. It also works fine if I set both monitors to 1920x1080. The modesetting driver seems to struggle with setting resolutions. When I first log into the desktop, it takes a good 5 seconds longer than the intel driver to set up the screens, and for a while it looks like I have a 640x480 screen (judging by the huge mouse pointer I get). Given this bug and the vertical refresh bug, maybe yakkety shouldn't default to the modesetting driver? ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: xserver-xorg 1:7.7+13ubuntu3 Uname: Linux 4.7.2-040702-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.3-0ubuntu7 Architecture: amd64 BootLog: 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 Date: Tue Aug 30 19:26:06 2016 DistUpgraded: 2016-07-25 02:38:44,004 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: yakkety DistroVariant: ubuntu DkmsStatus: bbswitch, 0.8, 4.4.0-9136-generic, x86_64: installed bbswitch, 0.8, 4.7.2-040702-generic, x86_64: installed nvidia, 367-367.44, 4.4.0-9136-generic, x86_64: installed nvidia, 367-367.44, 4.7.2-040702-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Dell HD Graphics 530 [1028:06e4] InstallationDate: Installed on 2016-07-04 (57 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) JournalErrors: Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system. Users in the 'systemd-journal' group can see all messages. Pass -q to turn off this notice. No journal files were opened due to insufficient permissions. MachineType: Dell Inc. XPS 15 9550 ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.7.2-040702-generic root=UUID=8de7ebec-48db-48b6-9eb9-fafdee4eb7d6 ro rootflags=subvol=@ quiet splash nogpumanager vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to yakkety on 2016-07-24 (36 days ago) dmi.bios.date: 04/07/2016 dmi.bios.vendor: Dell Inc. dmi.bios.version: 01.02.00 dmi.board.name: 0N7TVV dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr01.02.00:bd04/07/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 15 9550 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.70-1 version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.1-3ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.1-3ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160706-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1618423/+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
