Embattled Nvidia chief executive Jensen Huang has cancelled plans to attend several technology summits, but he is still listed as the main speaker for his company's GTC event in Washington next month. He is scheduled to deliver the keynote address on the first day of Nvidia's flagship exhibition, running from December 1 to 3. That is assuming that Mr Huang, who admitted to having an affair with a woman who US investigators say is a Chinese spy, does not resign under intense public scrutiny.