I have tested upstream 3.8.0-rc7
The bug can be reproduced upstream. However in the course of testing I
have found settings that appear to work on both kernels.
It appears the bug is dependent not only on BIOS settings, but on
whether the last boot was a hard boot or soft reset / shutdown -r
Hence my conclusion that BIOS setting "xHCI: enabled" caused a kernel
panic appears incorrect.
I have played around some more with the BIOS settings and with the following
both my SD cards are detected and working, both on upstream and current Ubuntu
12.10 kernel, 3.5.0:
EHCI: enabled
Legacy USB support: enabled
Legacy USB3 support: enabled
xHCI: enabled
EHCI handoff: disabled
A configuration that causes unhandled errors in dmesg when I insert an SD card,
both upstream and Ubunty stock kernels, is:
EHCI: enabled
Legacy USB support: enabled
Legacy USB3 support: enabled
xHCI: auto
EHCI handoff: disabled
With this configuration I am also getting crashes / kernel panic after
boot & login, which can happen when there is no activity at the
terminal. Actually it's not clear if these are linked to the SD card
problems, or a separate bug.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1125136
Title:
Read errors and kernel panic - Astrotek / genesys USB3 internal card
reader
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