Seems like a bug in Xfce, but I'm not sure if it's fixed or not. With 16.04 reaching EOL at the end of this month, I'm moving this to be tracked by Xfce.
-- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to Ubuntu Studio. Matching subscriptions: UbuntuStudio Bugs https://bugs.launchpad.net/bugs/1617003 Title: "vblank wait timed out" triggered by Notes (panel app) install Status in xfce4 package in Ubuntu: New Bug description: Ubuntu Studio 16.04 on Lenovo T520 laptop. I installed (Panel App -> Panel -> Install New Items) the Notes panel app. After doing so (and continuing after I removed it) I'm now getting this sort of error in dmesg: [64397.223784] WARNING: CPU: 2 PID: 3000 at /build/linux-5vkMGy/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b0/0x1c0 [drm]() [64397.223785] vblank wait timed out on crtc 0 The user-visible symptom is that many apps (Firefox, Thunderbird, LibreOffice) now hang upon launch. If I poke around in the process tree, all apps are waiting on a subprocess. Killing the subprocess will bring up the app. Running strace on the processes, the hanging subprocesses have this in common: * opening /etc/drirc for read * checking for the existence of ~/.drirc (it doesn't exist) * a syscall writing to some handle that ends up hanging, e.g. ioctl(5, DRM_IOCTL_I915_GEM_CREATE, 0x7ffd90290680) = 0 ioctl(5, _IOC(_IOC_READ|_IOC_WRITE, 0x64, 0x5e, 0x28), 0x7ffd90290630) = 0 ioctl(5, DRM_IOCTL_I915_GEM_SET_DOMAIN, 0x7ffd90290630) = 0 ioctl(5, DRM_IOCTL_I915_GEM_SET_DOMAIN <unfinished ...> I've attached a larger fragment from dmesg. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4/+bug/1617003/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp
