Comment 103 for bug 1217585

I have the same problem. It is a very old problem (years). When I use the open driver instead of the proprietary one, I have random frequent freezes (no more remote ssh, no more mouse; only the static last image). The only possibility is a brutal reset, resulting inconsole emergency at reboot and "fsck /home" (very danderous).

lspci | grep -i vga
01:00.0 VGA compatible controller: NVIDIA Corporation GT215 [GeForce GT 240] (rev a2)

uname -r
3.17.4-301.fc21.x86_64

Some input from /var/log/messages, near the freezes:

1:
Dec 9 15:23:02 localhost kernel: nouveau E[ PGRAPH][0000:01:00.0] vm flush timeout
Dec 9 15:23:04 localhost kernel: nouveau E[ VM][0000:01:00.0] vm flush timeout: engine 13
Dec 9 15:23:07 localhost kernel: nouveau W[ PFIFO][0000:01:00.0] unknown intr 0x00200000, ch 6
Dec 9 15:23:08 localhost kernel: nouveau W[ PFIFO][0000:01:00.0] unknown intr 0x04000000, ch 6
Dec 9 15:23:10 localhost kernel: nouveau E[ PGRAPH][0000:01:00.0] vm flush timeout
Dec 9 15:23:12 localhost kernel: nouveau E[ VM][0000:01:00.0] vm flush timeout: engine 13
Dec 9 15:23:15 localhost kernel: nouveau W[ PFIFO][0000:01:00.0] unknown intr 0x04000000, ch 6
Dec 9 15:23:15 localhost kernel: nouveau E[ PGRAPH][0000:01:00.0] vm flush timeout

2:
Dec 10 07:13:51 localhost kernel: nouveau E[ PGRAPH][0000:01:00.0] vm flush timeout

3 - an old case, on Fedora 20, from a remote console (ssh), before it lost the connection:
[ 2065.627268] nouveau W[ PFIFO][0000:01:00.0] unknown intr 0x00400000, ch 3