https://bugs.kde.org/show_bug.cgi?id=489222
--- Comment #6 from Jakob Petsovits <jpe...@petsovits.com> --- (In reply to ezh from comment #4) > Is this format OK? Thanks, that's a good trace. Looking at the code, I wonder if in ddcutil's ddc_close_display() (at ddc/ddc_packet_io.c:373, according to your trace) the hash table is concurrently being accessed from another thread. That file has a mutex for its `open_displays` global variable (called `open_displays_mutex`) but it's not in use for opening and closing displays. The ddc_open_display() function has a comment "protect with lock?" next to a similar access of the same variable. Our code is setting the brightness from a different thread than the one that was used to initialize ddcutil. I could imagine that powerdevil's brightness setting code is doing something to `open_displays` at the same time as ddcutil's background display/connection monitoring code. Do you have backtraces of any further threads that might also show ddcutil functions happening simultaneously? -- You are receiving this mail because: You are watching all bug changes.
