Sounds like your machine doesn't support PCI-E hotplugging.
Assuming you have an eeepc, read here, particularly Post 15:
Well, there are 3 different issues with the 1005PE model, which are related.
First, Win7 compatible bios, check if the eeepc-laptop module is loaded:
lsmod | grep eee
If not, you'll need this kernel parameter:
Second, to fix the brightness, another parameter:
Finally, the actual bug, as described in acpi4asus git:
To work around the problem, disable hotplugging with this parameter:
Summarizing, add the needed parameters to your Grub, see below, and update:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor eeepc_laptop.hotplug_disabled=1"