Hi, Po-Hsu Here is my analysis, the hardware disapears from kernel log and lspci output, it has two possiable causes:
1, BIOS issue 2, kernel driver issue I asked you to test 3.13.0-031300 kernel, which has no O2Micro initialization codes, the result turns out the hardware won't disappear. So I'm quite confident the root cause is in that O2Micro initialization codes. Will report this issue to vendor who has the datasheet. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1346067 Title: [Dell Latitude E5440] O2 Card reader [1217:8520] is not stable on this system To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1346067/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
