sudo sh -c "echo w > /proc/sysrq-trigger" should've been the command I said in comment #24, sorry about that. The output from the sysrq-w points to a deadlock in tty code, will check the code further.
sudo sh -c "echo w > /proc/sysrq- trigger" should've been the command I said in comment #24, sorry about that. The output from the sysrq-w points to a deadlock in tty code, will check the code further.