The problem is caused by a combination of three bugs in the computer: 1) The card reader does not support L1 although this is a mandatory feature in the PCIe specification (see http://wireless.kernel.org/en/users/Documentation/ASPM). 2) The BIOS enables L1 although the hardware does not support it. 3) The BIOS dictates that ASPM must be disabled but it does not support _OSC control, so the Linux Kernel cannot disable ASPM during boot.
Workaround: Place the command "setpci -s 00:1c.2 0x50.B=0x41" into /etc/rc.local and create a new file /etc/apm/resume.d/21aspm with the same command. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1178131 Title: 14e4:16bc SD card slot not working on Acer Aspire One 756 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1178131/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
