During the Civil Disobedience Movement of 1930, the viceroy of India was Lord Irwin.

Explanation:
Lord Irwin, whose full name was Rufus Daniel Isaacs, was the viceroy of India from 1926 to 1931. He succeeded Lord Reading and served as the 3rd Earl of Reading. Lord Irwin played a significant role during the Civil Disobedience Movement initiated by Mahatma Gandhi in 1930.

The Civil Disobedience Movement was a nonviolent protest against the salt tax imposed by the British colonial government. Mahatma Gandhi led the movement, which aimed to challenge British authority and demand independence for India. As part of the movement, Gandhi and his followers marched to the coastal town of Dandi and illegally produced salt from seawater, defying the British monopoly on salt production.

As the viceroy of India, Lord Irwin was responsible for maintaining law and order in the country. He faced the task of dealing with the growing civil unrest and protests led by Mahatma Gandhi. Lord Irwin was known for his liberal approach and willingness to engage in dialogue with Indian leaders.

Recognizing the importance of resolving the growing tension, Lord Irwin initiated negotiations with Mahatma Gandhi. These talks eventually led to the signing of the Gandhi-Irwin Pact in 1931, which marked a significant milestone in the Indian independence movement. The pact called for the release of political prisoners, the withdrawal of the salt tax, and the participation of the Indian National Congress in the Second Round Table Conference in London.

Lord Irwin's tenure as the viceroy of India witnessed significant developments in the Indian independence movement. His willingness to engage in dialogue and negotiate with Indian leaders played a crucial role in paving the way for future negotiations and discussions on India's independence.