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IDProjectCategoryView StatusLast Update
0010296ardourbugspublic2026-04-25 09:11
ReporterLost_Highway Assigned To 
PriorityhighSeveritycrashReproducibilityrandom
Status newResolutionopen 
PlatformUbuntuOSLinuxOS Version(any)
Product Version9.2 
Summary0010296: Tempo-mapping in grid mode is sometimes very broken
DescriptionTempo-mapping in grid mode seems to be intermittently broken i.e. mostly it works as expected but occasionally it doesn’t work at all. I’ve encountered this with Ardour 8 and also recently with Ardour 9 (always obtained from the Ardour website, running on Linux).

With the attached session, in A9.2 I created a BBT marker near the beginning of the session. Subsequently, the creation of any bpm marker (whether manually, or those created automatically when using Grid mode) results in Ardour crashing/spontaneously closing.

In Grid mode, the cursor was the “wrong” one: hovering over the first beat of a bar, for most bars the cursor was a double-headed arrow (normally seen for other beats in a bar, I believe), for only a few bars here and there did the cursor show the square-with-the-bits-on-the-corners (same as in Stretch mode, i.e. the expected one) when hovering over the first beat. I’ve had this behaviour before in A8 with other sessions and re-opening the session later it would work correctly, but this particular session never showed the right behaviour in 9.2 no matter how many times I tried.

In these cases, and this specific one attached, trying to move the grid (whichever cursor was showing), instead of the grid compressing or expanding as you moved the cursor, the whole timeline moved left or right (all beats moving the same amount like scrolling, relative to the audio content of tracks). Then, as I mentioned, it just crashed after the movement was finished.

This session has odd time signatures (7/8, 14/8, 15/8) and many time signature changes.

I have managed to do the tempo-mapping/Grid mode work I needed in 8.12 without any issues. However, the session will now not open at all in 9.2, even in safe mode. The editor and mixer windows briefly load in outline (but can’t see any tracks), then it crashes. Running from the command line it says segmentation fault. It continues to open fine in 8.12.

I've tried reproducing the issues in a new session in A9.2, but everything worked as intended -- as I said before, this problem is very intermittent.
Steps To ReproduceIn the attached session, it now no longer opens at all following tempo-mapping done in A8.12 so I can't reproduce the earlier issues. It reliably crashes every single time I try to open it in A9.2
Tags9.2, Grid mode, segmentation fault, tempo map

Activities

Lost_Highway

2026-04-25 09:11

reporter  

MEMORY MAN NEW-2 2026.zip (276,867 bytes)

Issue History

Date Modified Username Field Change
2026-04-25 09:11 Lost_Highway New Issue
2026-04-25 09:11 Lost_Highway Tag Attached: 9.2
2026-04-25 09:11 Lost_Highway Tag Attached: Grid mode
2026-04-25 09:11 Lost_Highway Tag Attached: segmentation fault
2026-04-25 09:11 Lost_Highway Tag Attached: tempo map
2026-04-25 09:11 Lost_Highway File Added: MEMORY MAN NEW-2 2026.zip