The convention started with Debbie Wasserman Shulrz not gaveling the convention and earlier in the day with Sanders urging his supporters to get behind the Clinton-Kaine ticket, to defeat Trump. He was bored by his supporters. There are also demonstrations outside and at times competing chantss on the floor. Sanders has urged his supporters not to do that, or walk out, or turn their backs.
This beginning is showing deep fault lines in the party, which were responded by the email leak by wiki leaks. Several news organizations are reporting this is a Russian hack, but as Faieness and Accuracy in the Media reported yesterday, this is also an effort to avoid talking of the substance in these emails.