Opened 19 months ago

Last modified 19 months ago

#18013 new bug

Can't return to userspace after KDL

Reported by: pulkomandy Owned by: nobody
Priority: normal Milestone: Unscheduled
Component: System/Kernel Version: R1/beta3
Keywords: Cc:
Blocked By: Blocking:
Platform: All

Description

On my laptop, after entering KDL with the keyboard shortcut and typing "continue", the system freezes instead of returning to userspace.

I'm not sure how I can start debugging this.

Change History (6)

comment:1 by korli, 19 months ago

does it work when entering kdl with "kernel_debugger" ?

Last edited 19 months ago by korli (previous) (diff)

comment:2 by waddlesplash, 19 months ago

What KDL plugins are in use? That would be the likely place to start. Also seeing if you can enter KDL via the keyboard shortcut makes any difference (i.e. if you can enter it again during the "freeze".)

Initial things to investigate in my mind would be whether one of the KDL plugins (e.g. USB keyboard) misbehaves on your hardware, or somehow the scheduler does not kick in properly.

comment:3 by waddlesplash, 19 months ago

Ah, I see you said you entered via the keyboard shortcut in the first place. Well, then yes, trying what korli said would be one thing.

comment:4 by pulkomandy, 19 months ago

Same thing when entering using kernel_debugger.

I can't re-enter KDL after typing continue.

No USB keyboard connected, using the laptop's PS2 keyboard, but I don't think it made a difference (I can try again)

I have no way to add a serial port to this laptop at the moment.

comment:5 by waddlesplash, 19 months ago

Did this work at any point in time?

comment:6 by pulkomandy, 19 months ago

No, it's been this way since I got the machine, otherwise I would have reported an hrev number.

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