@Miroslav, Looking at the iwl driver it has a workaround for a H/W bug that addresses instability on the PCIe bus L0->L0S->L1 transitions and disables L0S. The workaround seems to check the PCI configuration as set by the firmware, hence this may a reason for the bug.
Currently I suspect the following scenario: 1. The driver can workaround a bug in the H/W, if the firmware has configured the PCI space correctly. 2. We may not have the PCI_CFG_LINK_CTRL_VAL_L1_EN bit set correctly, so the driver can't work around the H/W bug which disables L0S. 3. The link management may be then transitioning the H/W to L0S and we get into the situation where it appears the wireless H/W disappears when the link power management kicks in. 4. We see errors like "HARDWARE GONE?? INTA == 0xffffffff" which seems to confirm this. So, can you attach the output of "sudo lspci -xxxx" so I can eyeball the config space and see if this is what is happening. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/656745 Title: notebook always crashes if on battery (dell vostro 3700 and others) -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
