For what it's worth, we have not had problems with nvidia-304 on more recent GPUs, so I'd be inclined to blame the hardware (maybe that generation, maybe the integrated type like you mentioned) sooner than the driver. But you're right that blacklisting the older driver would probably eliminate the entire class of problems :)
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1424013 Title: Compiz high CPU and UI freeze on NVIDIA after fix for #269904 in trusty-updates Status in compiz package in Ubuntu: Confirmed Bug description: Immediately after the fix for #269904 landed in trusty-updates via compiz 1:0.9.11.3+14.04.20150122-0ubuntu1, my 14.04 machine with an NVIDIA card and using the nvidia-304 driver became unusable -- symtoms include compiz process high CPU (100%), UI freeze right after logging in (machine still up, reachable via SSH from the network), and a flood of these messages on the system log: Feb 19 15:44:40 caracas kernel: [61380.415504] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 15:44:40 caracas kernel: [61380.509022] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 15:44:40 caracas kernel: [61380.596324] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 15:45:00 caracas kernel: [61400.576153] NVRM: Xid (PCI:0000:00:0d): 13, 001e 3141590c 00000019 00000104 00009e09 00000002 Feb 19 15:45:00 caracas kernel: [61400.579199] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 15:45:00 caracas kernel: [61400.581156] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 15:45:03 caracas kernel: [61404.121869] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000002 Instance 00000000 Intr 00100000 Feb 19 15:45:03 caracas kernel: [61404.125282] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 15:45:06 caracas kernel: [61407.122121] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 15:45:08 caracas kernel: [61408.576039] NVRM: Xid (PCI:0000:00:0d): 8, Channel 00000020 Feb 19 15:45:09 caracas kernel: [61410.172039] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 15:45:17 caracas kernel: [61417.576038] NVRM: Xid (PCI:0000:00:0d): 8, Channel 00000000 Feb 19 15:45:17 caracas kernel: [61417.852055] NVRM: Xid (PCI:0000:00:0d): 13, 0000 e0016100 0000008a 00000104 000097ef 00000002 Feb 19 15:45:17 caracas kernel: [61417.854077] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 15:45:32 caracas kernel: [61432.605045] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context Feb 19 15:45:34 caracas kernel: [61434.605060] NVRM: os_schedule: Attempted to yield the CPU while in atomic or interrupt context Feb 19 15:45:34 caracas kernel: [61434.605085] NVRM: Xid (PCI:0000:00:0d): 3, C 00000000 SC 00000003 M 00000104 Data 00000000 Feb 19 15:45:34 caracas kernel: [61434.612631] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:09:51 caracas kernel: [62891.790512] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:09:51 caracas kernel: [62891.888564] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:09:51 caracas kernel: [62892.020478] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:10:08 caracas kernel: [62909.312143] NVRM: Xid (PCI:0000:00:0d): 13, 001e 3141590c 00000019 00000104 00009e09 00000002 Feb 19 16:10:08 caracas kernel: [62909.315192] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 16:10:08 caracas kernel: [62909.317144] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 16:10:10 caracas kernel: [62911.110191] NVRM: Xid (PCI:0000:00:0d): 13, 0000 e0016100 0000008a 00000104 000097ef 00000002 Feb 19 16:10:10 caracas kernel: [62911.112162] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000020 Instance 00000000 Intr 00100000 Feb 19 16:10:10 caracas kernel: [62911.134421] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000002 Instance 00000000 Intr 00100000 Feb 19 16:10:10 caracas kernel: [62911.149813] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000002 Instance 00000000 Intr 00100000 Feb 19 16:10:10 caracas kernel: [62911.184901] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:10:10 caracas kernel: [62911.230574] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:10:10 caracas kernel: [62911.261815] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:10:10 caracas kernel: [62911.296811] NVRM: Xid (PCI:0000:00:0d): 1, Channel 00000002 Method 00000060 Data beef0233 Feb 19 16:10:10 caracas kernel: [62911.303612] NVRM: Xid (PCI:0000:00:0d): 9, Channel 00000002 Instance 00000000 Intr 00100000 I do not experience any problems if I downgrade to the previous compiz version that was available in trusty-updates (1:0.9.11.3+14.04.20141104-0ubuntu1). 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