How about a hard power switch? + crash report
(05-17-2020, 04:01 PM)Dendrocalamus64 Wrote: Yes, CONFIG_MAGIC_SYSRQ is enabled, but it's occasionally useful so I don't want to turn it off if I don't have to.

Dendrocalamus64, sysrq is not enabled by default on MrFixIT's kernel:


You did not run into garbage SYSRQs anyway. The cause of your kernel crashes is hard to debug. Perhaps install MrFixIT's latest kernel 4.4.222 or even better move to a distribution with a 5.X kernel. The 5.X kernels are rock-stable on the Pinebook Pro.

(05-15-2020, 09:52 AM)manawyrm Wrote: Manjaro have disabled SYSRQs in our kernel for this reason.

More recent kernels, such as Manjaros 5.X kernel, have an additonal option CONFIG_MAGIC_SYSRQ_SERIAL. I'm surprised Manjaro has completely disabled SYSRQ while not making use of CONFIG_MAGIC_SYSRQ_SERIAL=0.

(05-18-2020, 12:00 AM)manawyrm Wrote: SYSRQs can also be issued over the UART. And the UART on the PBP is also being used as the headphone jack for audio.
There is significant (~3Vpp) Crosstalk between the audio and UART lines. This is a hardware issue.

This is highly interesting but why is there cross-talk even when there is no headset plugged in? Shouldn't the audio line be "idle"?

Messages In This Thread
RE: How about a hard power switch? + crash report - by Der Geist der Maschine - 05-24-2020, 04:03 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Pinebook Pro not powering on when eMMC hardware switch is off vgrimaldi 2 452 06-29-2021, 05:19 AM
Last Post: KC9UDX
  Gimp makes stock Manjaro KDE/X11 crash stozi 3 998 04-21-2021, 08:15 AM
Last Post: stozi
  Replacement Power Cord recommendation? nathanielwheeler 3 860 01-23-2021, 06:43 PM
Last Post: KC9UDX
  power light blinking during charge when pbpro is off Idaho 0 697 01-04-2021, 10:53 AM
Last Post: Idaho
  Taming the power switch? ab1jx 4 1,789 11-30-2020, 10:57 PM
Last Post: rimaille
  Power consumption and suspend to ram robt 33 18,112 11-30-2020, 04:32 PM
Last Post: wdt
Exclamation Seemingly lost power permanently now /cry jimsurvak 2 1,223 11-16-2020, 06:22 PM
Last Post: jimsurvak
  Pinebook Pro won't post after hard reset i6Shot 15 5,648 09-28-2020, 12:45 PM
Last Post: i6Shot
Photo Faulty power circuit hackerfantastic 1 1,055 08-24-2020, 01:48 PM
Last Post: Arwen
  We need more power, Scotty! mtnygard 4 2,339 07-23-2020, 11:21 AM
Last Post: mamboman777

Forum Jump:

Users browsing this thread: 1 Guest(s)