https://bugs.freedesktop.org/show_bug.cgi?id=105880
--- Comment #16 from Chí-Thanh Christopher Nguyễn chithanh@gentoo.org --- I tried with 4.16, made no difference. But as dc_log=1 on 4.16 gives no helpful additional output, I will try on Monday with 4.15 again. It may also be possible that I am affected both by the issue in this bug and what was reported in comment 8 (but discussion about which should be continued in a separate bug report).