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I'm staying somewhere for a while where there are two wifi networks. One's mediocre, one sucks. The mediocre one worked fine on my HP machine with a Realtek card running Mint for several days. Suddenly DNS stopped working. The connection "strength" is still good. ping http://google.com fails instantly, Chrome fails with

DNS_PROBE_FINISHED_BAD_CONFIG

The poorer network still works okay. Additionally, on that same previously okay network, I get the same problem with DNS when I boot over to an installation of Ubuntu. I'm currently on a Macbook using it now, so the problem seems specific to the machine (the Macbook working seems to rule out it being the network, and it not working on the Ubuntu side and the Mint side suggests it's a firmware issue?).

I blindly followed these steps, from this forum post: http://ubuntuforums.org/showthread.php?t=2219952

, but it didn't change anything:

sudo apt-get install --reinstall linux-headers-generic linux-headers-$(uname -r) build-essential dkms git
git clone https://github.com/FreedomBen/rtl8188ce-linux-driver
cd rtl8188ce-linux-driver
make
sudo make install
sudo cp -r firmware/* /lib/firmware
echo "options rtl8188ee ips=0 fwlps=0" | sudo tee /etc/modprobe.d/rtl8188ee.conf

So, why might DNS suddenly stop working for a particular wireless network on a particular machine?

Thanks

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