I can confirm that it is happening now and again. But especially when the screen is locked after a certain amount of time. After I put the password one of the screens (I use two) doesn't work. This is my uname -a : ThinkPad-T450 3.19.0-30-generic #34~14.04.1-Ubuntu SMP Fri Oct 2 22:09:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I normally open a console with Ctrl Alt F1 and then I go back the desktop with Alt F7 and it solve temporarily the problem (At least till the next locked screen) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1503572 Title: Crypt Login freeze and random system freeze Status in linux package in Ubuntu: Confirmed Bug description: After last two kernel updates in Ubuntu 15.04 (so 30 and 28) I am experiencing the random screen freeze as well as there is no way to write my Crypt password the first time I boot (through graphical interface). My workaround is that when Crypt login screen appears I hold power button to reboot the machine (Lenovo T450s) which then gives me terminal login through Crypt. Additional regression appears as whole system freeze at random moments (can be in browser or in OpenOffice). What is even more worrying is that I have dmesg full of errors ([drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! ) - something that was not there before. Also it does not matter if I have external monitor connected over HDMI or not, it does not matter if I have USB devices connected or not, the Crypt login freeze is repeatable 100%, but I do not know how to get logs from that boot or what to look. [ 9.155615] ACPI: Video Device [VID] (multi-head: yes rom: no post: no) [ 9.155987] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input15 [ 9.158359] device-mapper: multipath: version 1.7.0 loaded [ 9.158591] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! [ 9.158772] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! ... [ 9.280656] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 9.297274] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! [ 9.297445] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915_bpo]) [ 9.297453] [drm] Initialized i915_bpo 1.6.0 20150522 for 0000:00:02.0 on minor 0 [ 9.298242] fbcon: inteldrmfb (fb0) is primary device [ 10.275607] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! .. [ 10.337233] Console: switching to colour frame buffer device 240x67 [ 10.343218] i915_bpo 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 10.343218] i915_bpo 0000:00:02.0: registered panic notifier [ 10.356167] Adding 8077308k swap on /dev/mapper/ubuntu--vg-swap_1. Priority:-1 extents:1 across:8077308k SSFS ... [ 32.521174] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! [ 32.521473] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! [ 32.536040] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! lshw for display: *-display description: VGA compatible controller product: Broadwell-U Integrated Graphics vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 09 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915_bpo latency=0 resources: irq:49 memory:e0000000-e0ffffff memory:d0000000-dfffffff ioport:3000(size=64) 3.19.0-30-generic #34-Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1503572/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
