Re: [BUG] 4.14 regression: Xorg hangs on exit

From: Bob Tracy
Date: Tue Nov 21 2017 - 23:11:51 EST

On Tue, Nov 21, 2017 at 11:12:35AM -0600, Bob Tracy wrote:
> Apologies for the lack of detail, but the subject pretty much says it
> all. Xorg works fine with 4.13, but hangs on exit with 4.14.
> Logging in remotely and applying the "kill -9" sledgehammer has no
> effect. System logs don't show anything unusual going on. Rebooting
> hangs because of the unkillable process: hitting the reset switch is
> the only way forward.
> Video driver is "radeon", reporting "ATOM BIOS: REDWOOD" at boot time.
> Console is fb0 == radeondrmfb.

Only an "occasional" bad deal? Lockup doesn't happen every time.
I'll make this a "watch" item for the time being. I'd apologize for the
noise, but I never saw this happen prior to running the 4.14 kernel.
Maybe was just lucky up until now :-(.

Running a 32-bit SMP kernel per "uname -a" output below:

Linux gherkin 4.14.0 #1 SMP PREEMPT Thu Nov 16 23:34:38 CST 2017 i686 Intel(R) Core(TM) i7-2600S CPU @ 2.80GHz GenuineIntel GNU/Linux

The i7-2600S has four hyperthreaded cores (/proc/cpuinfo shows 8 CPUs).