3 ms·
Doh! Missed your followup. Looks like the exact same card and driver version are mentioned in Bug 1422850 (https://bugzil.la/1422850 https://bugzil.la/1422850),
by callahad 9y ago
Doh! Missed your followup. Looks like the exact same card and driver version are mentioned in Bug 1422850 (https://bugzil.la/1422850 https://bugzil.la/1422850), and that disabling hardware acceleration should temporarily fix it.
I'd suggest signing into Bugzilla and following that bug so you get email updates when it changes status.