On 08/16/2015 03:03 PM, Charles Curley wrote:
> I have just taken delivery of a used Lenovo T520. Partial BIOS data
> courtesy of dmidecode:
> 
> BIOS Information
>         Vendor: LENOVO
>         Version: 8AET51WW (1.31 )
>         Release Date: 08/08/2011
> 
> It has a RealTek WiFi adapter:
> 
> 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
> 802.11b/g/n WiFi Adapter (rev 01)
> 
> I had a devil of a time getting it to fly; it didn't even show up in
> lspci.
> 
> Finally, out of desperation, I booted Windows. I was able to examine
> the device using the Control Panel, including the PCI bus address. I was
> also able to hook up to my home network, and extract the MAC address.
> 
> I then shut the machine down completely. When I booted into Linux, the
> device was there, and the network worked immediately.
> 
> So I conjecture something had had the device turned off, to the point
> that it did not show up on the PCI bus. I also conjecture that Windows
> had found it and enumerated it it for its own use, and left it turned
> on.
> 
> So my question is, is there a Linux tool for turning on PCI devices in
> such a situation? In case something makes this device disappear again?

Is it possible you're missing the firmware file for it on Linux?  After
windows had booted it loaded the firmware for you, so the device works.
On Debian there's a firmware-realtek package you need to have installed.
Not sure about other distros.

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