My mistake. Ok, I get into text mode and follow instructions by LinuxLoverForever and install video-linux, then I try uniinstal nvidia drivers, but it end with error.
checking dependencies...
error: failed to prepare transaction (could not satisfy dependencies)
:: removing linux57 breaks dependency 'linux57' required by linux-latest
:: removing linux57-nvidia-340xx breaks dependency 'linux57-nvidia-340xx required by linux-latest-nvidia-340xx
error: pacman failed!
error: script failed!
In another thread someone this solve by command:
sudo pacman -Rcsnu linux-latest
I should try this command too?