I have analyzed a little bit the problem. The bug should be related to
the module acpiphp because the problem persists also in the 3.5 ubuntu
package if this module is not loaded. then I have downloaded the ubuntu
pathes applied by ubuntu and I have found a part that is related to this
module:
--- linux-3.5.0.orig/drivers/pci/hotplug/acpiphp_glue.c
+++ linux-3.5.0/drivers/pci/hotplug/acpiphp_glue.c
@@ -132,6 +132,15 @@
if (!acpi_pci_check_ejectable(pbus, handle) && !is_dock_device(handle))
return AE_OK;
+ status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
+ if (ACPI_FAILURE(status)) {
+ warn("can't evaluate _ADR (%#x)\n", status);
+ return AE_OK;
+ }
+
+ device = (adr >> 16) & 0xffff;
+ function = adr & 0xffff;
+
pdev = pbus->self;
if (pdev && pci_is_pcie(pdev)) {
tmp = acpi_find_root_bridge_handle(pdev);
@@ -144,10 +153,6 @@
}
}
- acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
- device = (adr >> 16) & 0xffff;
- function = adr & 0xffff;
-
newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
if (!newfunc)
return AE_NO_MEMORY;
The name of the module is mentioned in other parts in the patch so I
think that this code is not enough. Anyway I think it could be very
helpful for you.
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https://bugs.launchpad.net/bugs/1159418
Title:
plug and play with thunderbolt devices was working with 3.5 but is
still not working with 3.8
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