After letting my desktop locked for 10 days, I found it frozen, with root filesystem 100% full.
Apparently, /var/log/kern.log
and /var/log/syslog
have received more than 60'000 times per second the following line :
Jan 3 07:35:56 hostname kernel: [1091871.858753] nouveau 0000:03:00.0: fifo: PBDMA0: 04000000 [ACQUIRE] ch 2 [007f9a3000 Xorg[2915]] subc 0 mthd 001c data 00001004
This is with:
- Ubuntu 16.04 LTS
- linux-image-generic: 4.4.0
- xserver-xorg-video-nouveau: 1:1.0.12
What can we do with it?
That version of the
nouveau
driver seems to be buggy with my graphic card when the Desktop is in power saving (or at least with the screensaver). https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1474538One workaround can be to switch to nvidia driver : http://www.linuxandubuntu.com/home/how-to-install-latest-nvidia-drivers-in-linux
An other possibility is to stay with nouveau driver, but use the latest version available through the installation of the "LTS Enablement Stack" : https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Ubuntu_16.04_LTS_-_Xenial_Xerus
That second option worked for me, so all I did was :
and reboot on the latest kernel & newer nouveau driver.