Mesmo erro que o JadeHouse:
[9940:9940:0228/003228.235113:ERROR:process_singleton_posix.cc(433)] readlink failed: Permission denied (13)
[9940:9940:0228/003228.235232:ERROR:process_singleton_posix.cc(256)] readlink(/home/robert/.config/google-chrome/SingletonLock) failed: Permission denied (13)
[9940:9940:0228/003228.235288:ERROR:process_singleton_posix.cc(256)] readlink(/home/robert/.config/google-chrome/SingletonLock) failed: Permission denied (13)
[9940:9940:0228/003228.235313:ERROR:process_singleton_posix.cc(280)] Failed to create /home/robert/.config/google-chrome/SingletonLock: Permission denied (13)
[9940:9940:0228/003228.235794:ERROR:process_singleton_posix.cc(433)] readlink failed: Permission denied (13)
[9940:9940:0228/003228.235824:ERROR:process_singleton_posix.cc(256)] readlink(/home/robert/.config/google-chrome/SingletonLock) failed: Permission denied (13)
[9940:9940:0228/003228.235924:ERROR:chrome_browser_main.cc(1496)] Failed to create a ProcessSingleton for your profile directory. This means that running multiple instances would start multiple browser processes rather than opening a new window in the existing process. Aborting now to avoid profile corruption.
[9940:9977:0228/003228.268812:ERROR:browser_gpu_channel_host_factory.cc(121)] Failed to launch GPU process.
sudo killall google-chrome diz que nenhum processo está sendo executado rm /home/subham/.config/google-chrome/SingletonLock diz que o acesso foi negado Curiosamente, posso escolher o Chrome como meu navegador padrão, mas nada será iniciado. O google-chrome-stable no Terminal produz a falha ao lançar o erro de processo da GPU acima.
Tente
sudo chown robert:robert /home/robert/.config/google-chrome -R
Se falhar, remova /home/robert/.config/google-chrome e permita que ele crie uma nova configuração. Espero que você tenha backup de seus favoritos.
sudo rm -R /home/robert/.config/google-chrome
relançar o Google Chrome.