Display not updated when shift-selecting with autorepeat

[Patrick Smears]

When using shift selection mode (i.e. shift-select-mode set to 't'), if I hold down shift and an arrow key to select a long range (in any direction), the display only updates to show the selection for the first keypress, and after that does not update to reflect the selection until the arrow key is released. This makes selecting by keyboard very hard as it's impossible to tell how much has been selected.

Though this sounds like the behavior expected when 'redisplay-dont-pause' is nil, that variable is set to 't' (and changing it has no effect).

This does not happen with other text editors (e.g. gnome-text-editor), and did not happen prior to upgrading (from Precise/emacs21).

The X server is Xming 7.5.0.62 on Windows .

[Patrick Smears (patri5k)]

Additional data point: this problem seems to be restricted to selection - holding down (for example) a letter key, the display always updates and I see each character appear one by one; when selecting this doesn't happen and I only see the new selection when I release the arrow key.