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F26 Cinnamon + switch user = Black Screen of Death BlkSOD

asked 2017-07-27 18:21:59 -0500

r0dc gravatar image

updated 2017-07-29 15:54:10 -0500

When trying to switch users, while using Cinnamon, the system freezes. The screen more often than not goes black. The only recovery is power cycling. This problem will happen trying to switch users from a users desktop environment, or the password prompt lock screen.

I switched the users on the affected machine to Gnome Desktop, every thing works just fine. BlkSOD only occurs with Cinnamon.

Searching the internet I see this is a recurring problem on several releases & distros. But I have yet to find a "smoking gun" that solves my problem.

Machine/Software Config: System: Host: variable Kernel: 4.11.11-300.fc26.x8664 x8664 (64 bit gcc: 7.1.1) Desktop: Cinnamon 3.4.4 dm: gdm,lightdm Distro: Fedora release 26 (Twenty Six)

Machine: Device: laptop System: HP product: HP ENVY x360 Convertible 15m-bq0xx v: Type1ProductConfigId Mobo: HP model: 8311 v: 34.22 UEFI: Insyde v: F.02 date: 05/04/2017 Chassis: type: 10

CPU: Quad core AMD FX-9800P RADEON R7 12 COMPUTE CORES 4C+8G (-MCP-) cache: 4096 KB flags: (lm nx sse sse2 sse3 sse41 sse42 sse4a ssse3 svm) bmips: 21560 clock speeds: min/max: 1400/2700 MHz 1: 1800 MHz 2: 1800 MHz 3: 1400 MHz 4: 1800 MHz

Graphics: Card: Advanced Micro Devices [AMD/ATI] Carrizo bus-ID: 00:01.0 chip-ID: 1002:9874 Display Server: x11 (Fedora 119.3) driver: N/A Resolution: 1920x1080@59.98hz OpenGL: renderer: Gallium 0.4 on AMD CARRIZO (DRM 3.10.0 / 4.11.11-300.fc26.x86_64, LLVM 4.0.0) version: 4.5 Mesa 17.1.5 (compat-v: 3.0) Direct Render: Yes

Help getting this resolved will be much appreciated, thanks for reading...

Rod in Ft Collins, CO

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answered 2017-07-30 02:09:29 -0500

rookieoz gravatar image

updated 2017-07-30 21:55:43 -0500

Are you certain the computer is locked up it may just not be loading the login manager? Can you try pressing Alt+Ctrl+F2 and seeing if you can log into a terminal? (Let me know if that works and it should be simple to do a work around until it can be fixed properly.)

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Tada! That worked. In all cases where I thought ther computer was locked: switching users from desktop environment & from lock screen, pressing Alt-Ctrl-F2 brought the UI alive. Not sure it was a terminal, I was brought to an active lockscreen that allowed me to enter my password & continue on....

r0dc gravatar imager0dc ( 2017-07-31 16:44:05 -0500 )edit

Haha great but unexpected that alone brought back the UI. Normally when you press Alt+Ctrl+F2 - F7 it will open a blank terminal window (try it if you like and press Alt+Ctrl+F1 to go back to your normal graphical desktop).

Perhaps the login manager uses the second "virtual space" (Alt+Ctrl+F2) at some point, I don't understand exactly why that fixed it immediately.

Edit: Hopefully after the next update of the login manager (GDM, MDM or LightDM I forget which Cinnamon uses) or the next Cinnamon package update this is fixed properly.

rookieoz gravatar imagerookieoz ( 2017-08-01 05:00:36 -0500 )edit

Finally got back to this for more testing. Alt-Ctrl F3, F5, F6, bring up a "console" terminal (not GUI terminal). F4 & F7 clear active windows in the GUI, but leave behind the Desktop bacground & Desktop icons. Alt-Ctrl-F2 brings back the GUI environment or the lock screen, depending on when you press Alt-Ctrl-F3.....etc. or attempt to switch users.

Alt-Ctrl-F1 brings up the login screen.

I should probably file a bug report for this issue...

Thanks again for your help.

r0dc gravatar imager0dc ( 2017-08-03 06:31:44 -0500 )edit

i'm still using Fedora 25 but to be honest I haven't really explored the alt-ctr-f1-f7 buttons extensively, it sound more complex than debian which i'm more familiar with.

rookieoz gravatar imagerookieoz ( 2017-08-04 04:07:59 -0500 )edit

Yeah things are never what they seem, esp with Linux :-) I'm all good for now, got a solution that works & we'll see what happens....Thanks again for your help.

r0dc gravatar imager0dc ( 2017-08-04 05:40:07 -0500 )edit

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Asked: 2017-07-27 18:21:59 -0500

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Last updated: Jul 30 '17