as previously mentioned, I did a very careful reinstallation on my amd64
with legacy 340:
05:00.0 VGA compatible controller: NVIDIA Corporation G98 [GeForce 8400
GS Rev. 2] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. [MSI] G98 [GeForce
8400 GS Rev. 2]
Flags: bus master, fast devsel, latency 0, IRQ 30, NUMA node 0
Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at fa000000 (64-bit, non-prefetchable) [size=32M]
I/O ports at ec00 [size=128]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [128] Power Budgeting <?>
Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1
Len=024 <?>
Kernel driver in use: nvidia
Kernel modules: nvidia
Did it!
Carefully avoid to install "new" nvidia packages.
do it with apt by hand, before take care, that no nvidia confs are left
on the system.
