Crypt Login freeze and random system freeze

[crt]

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

[Maximilian (mkoegel)]

Same problem here concerning input of encryption password on boot and the log entries, no freezes though: Lenovo T450s 3.19.0-30-generic kernel Ubuntu 15.04

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[philbuntu (phil-stephenson)]

Experiencing the same issue here:

ThinkPad T450s
Ubuntu 15.04
Linux philbuntu 3.19.0-30-generic #34-Ubuntu SMP Fri Oct 2 22:08:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

I have not experienced the system freezes though.

[Morten Clausen (morten-c)]

I can confirm this behaviour for my T450s runnig 15.04 with 3.19.0-30 kernel. Using the same workaround to input my dm-crypt password. Only one system freeze so far, kernel log also stating repeatedly

[drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)!

But I can't confirm this issue for 3.19.0-28-generic kernel. Currently using this kernel as fallback and everything seems to work fine.

Please let me know if you need further information.

[lebensmittelabteilung (christianbreuer)]

I can confirm this bug for my ThinkPad T450, model 20BV001BGE running 15.04 for kernel 3.19.0-30 and 3.19.0-31. Plus, something maybe interesting, when using these kernels the intel-linux graphics installer doesn't recognize the i915 graphics card.

If using the -28 kernel, the system is stable, I don't get the "The master control interrupt lied (SDE)!" error message and the intel-linux-graphics-installer recognizes the graphics card and runs smoothely. Hope this helps.

[David (dprude)]

I can also confirm this bug on a 2015 ThinkPad x1 carbon.

[Giuseppe Di Bella (dibek71)]

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)