See extra info at the bottom.
On 2020-06-25 16:36, [email protected] wrote:
I have a situation that I have not seen before.
1 - I plug a card reader into a USB3 port of a server
2 - I insert an SD card into the reader. It is /dev/sdk.
within a few seconds the full set of USB interfaces disconnect and the
machine
locks up soon after.
3 - I log in through a serial console
4 - I attempt to shut down mythtv
at this point the machine totally crashes. No magic sysrq response.
Pressing the reset button caused a boot into grub, looping with errors.
A full power off/on brought the system up properly. (*1)
I did it again, to check that the crash is related to the SD card, with same
result.
- The card reader is regularly used and never had any problem.
- The same card reader and SD card then worked just fine on another machine.
The SD card is the only new item here, acquired recently and maybe used for the
first time.
I find it unusual that an SD card can lead to the whole USB system aborting.
The death of MythTV is probably due to the unexpected disappearance of the USB
tuners, but it could
probably do better than just crash with "NULL pointer dereference".
This machine runs latest f30 (I know, I am just about to upgrade to f32).
$ uname -a
Linux e7.eyal.emu.id.au 5.6.13-100.fc30.x86_64 #1 SMP Fri May 15 00:36:06 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
(*1) the fact that a reset did not lead to a good restart makes me suspect that
the problem is
related to the hardware (the mobo? the fw?).
================================
[trimmed]
================================
Further investigation: I booted the f30 Xfce Live and f32 Xfce Live. Neither
caused the crash I have.
However, f30 did show an early I/O error on the SD but the reading (dd)
proceeded OK.
The f30 Live CD has kernel 5.0.9 (IIRC) while my server runs 5.6.13. Naturally
the logs were lost
so I will try to keep the messages when I test next time.
--
Eyal at Home ([email protected])
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