On Wed, 12 May 2021 16:44:59 +0300 Lev Serebryakov <l...@freebsd.org> wrote:
> On 12.05.2021 16:34, Gary Jennejohn wrote: > > > Is sysctl debug.debugger_on_panic set to 1? You should automatically > > land in ddb if that is set. I suppose it is, since you posted some > > back trace in an earlier mail. It also seems to be the default, at > > least in my FreeBSD-14 kernel. > > I see ddb report about panic, but it's all. Keyboard doesn't work, and > panic occurs before any disks are detected, so there is no space for crash > dump. > > > AFAIK ddb has a command to generate a crash dump. But I can't easily > > check that :( > > Yep, but console is dead & there are no disks for crash dump at this stage. > A real challenge to debug. Maybe you could break into boot and start it with the -d flag (see boot(8)) so that it will enter ddb as early as possible. Don't know whether you use the boot menu or not. I always disable it. > > It seems like there's a major bug when no SD card is inserted and the > > driver is in the kernel. And a timing problem when a card is in the > > slot at boot time. > > > > Good to know that the module still works. > > Yep, smoke tests for module (without inversion!) pass: I could mount R/W SD > card with release image, mount FS, read and write files, unmount FS and eject > card without panics and errors. I didn't try any high-load tests, though. > > > > > Difficult to debug without your laptop model in the hands of a developer. > > It is "pretty common" (but old) Lenovo ThinkPad T540p. I could provide > remote access to it, but it will not help for such low-level and early panic > :-( > I took a look and even refurbished T540p's are still pretty expensive. On the order of 500 Euros. -- Gary Jennejohn _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
