xfwm4 turning to state disk_sleep, causing whole display freeze

Submitted by tomangelo

Assigned to Olivier Fourdan @olivier

Link to original bug (#13658)

Description

Hi guys,

so as title says, every few seconds whole desktop is freezing for a second. My investigation has shown that when freeze occur, in htop xfwm4 process turns from S state to D state, seems like it's disk_sleep. So I ran "strace -e trace=open,close,read,write,connect,accept xfwm4 --replace" command, and it turned on that after every freeze there was 2 additional lines in console close(6) = 0 open("/dev/dri/card0", O_RDWR) = 6 so I guess it's some DRI related problem. I have Lenovo Z51-70 notebook with CPU Intel Core i5-5200U with Intel HD5500 and AMD Radeon R9 M375. All packages are up-to-date, xfwm4 is in 4.12.4 version, Debian 64bit, kernel 4.9.0-3.

Version: 4.12.0