After about an hour and a half of uptime, the flickering has returned (caused by using alt-number to switch windows in irssi). Moving the mouse cursor seems to reduce the flickering such that the screen can be read.
After about an hour and a half of uptime, the flickering has returned (caused by using alt-number to switch windows in irssi). Moving the mouse cursor seems to reduce the flickering such that the screen can be read.