[haiku-bugs] Re: [Haiku] #7092: boot fail when certain vesa resolution are selected
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Tue, 11 Jan 2011 16:59:12 -0000
#7092: boot fail when certain vesa resolution are selected
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Reporter: euan | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: Unscheduled
Component: System/Kernel | Version: R1/alpha2
Resolution: | Keywords:
Blocked By: | Has a Patch: 0
Platform: All | Blocking:
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Comment (by bonefish):
Replying to [comment:5 euan]:
> Alas I have no serial to dump the debug and the file is gone. :(
If the system boots far enough, you can access the syslog in the boot
loader after reset. Have a look at [http://dev.haiku-
os.org/wiki/ReportingBugs#Syslog].
> If I could single step the boot sequence that would be useful.
Not possible, I'm afraid.
> Is there a function to force KDL from the main boot programatically?
You can add `panic()` calls in `_start()` or -- it probably doesn't get
this far in your case -- in `main2()`. Depending on how early that
happens, the on-screen KDL might not be working yet. Since your problem
seem to be graphics related, it probably doesn't work, anyway. The (debug)
syslog might already show the output -- not that it will be of any help.
You can just as well track the point of the crash down by adding an
infinite loop in `_start()` (and called functions) and depending on
whether it crashes or hang bisect further. A bit tedious, but it works, if
the point of the crash is not affected by changes in the code.
> Or maybe a way to say put delays in the startup function so we can
record the event on camera? I know we get as far as the splash screen but
maybe it fails to completely draw the bottom lines and segfaults?
You could enable the on-screen debut output in the boot loader. It is
known to have issues and a full boot usually doesn't work when it is
enabled, but maybe it suffices in your case to track the problem down.
--
Ticket URL: <http://dev.haiku-os.org/ticket/7092#comment:6>
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