I'm sorry, after reading the report I noticed I should elaborate more (I was in a hurry).
I am running Debian sid for AMD64 on a Lenovo IdeaPad Y400 laptop (details can be seen on "Model information" section of last message). Video card is: 01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 650M] (rev a1) Full data from lspci is on last post. That is the only video card, I have seen most laptops with that model also have an Intel board for use with all that bumblebee + primus + bbswitch stuff, but this seems to be a stand alone hw config. A few days ago after a dist-upgrade kernel was upgraded to linux-image 3.13-1 and then, after reboot, nouveau driver stopped working. The error can be seen on kernel log: ... [ 10.221643] nouveau [ VBIOS][0000:01:00.0] ... appears to be valid [ 10.221644] nouveau [ VBIOS][0000:01:00.0] using image from PCIROM [ 10.221725] nouveau [ VBIOS][0000:01:00.0] BIT signature found [ 10.221727] nouveau [ VBIOS][0000:01:00.0] version 80.07.27.00.33 [ 10.221928] nouveau E[ VBIOS][0000:01:00.0] 0x83e0[ ]: unknown opcode 0x42 [ 10.221998] nouveau E[ DEVINIT][0000:01:00.0] init failed, -22 [ 10.222067] nouveau E[ DRM] failed to create 0x80000080, -22 [ 10.222344] nouveau: probe of 0000:01:00.0 failed with error -22 ... Then console mode is not changed and when KDM starts Xorg says nouveau driver can not be started and fails back to (i assume) vesafb: ... [ 44.824] (II) NOUVEAU driver Date: Thu Nov 7 14:56:48 2013 +1000 [ 44.824] (II) NOUVEAU driver for NVIDIA chipset families : [ 44.824] RIVA TNT (NV04) [ 44.824] RIVA TNT2 (NV05) [ 44.824] GeForce 256 (NV10) [ 44.824] GeForce 2 (NV11, NV15) [ 44.824] GeForce 4MX (NV17, NV18) [ 44.824] GeForce 3 (NV20) [ 44.824] GeForce 4Ti (NV25, NV28) [ 44.824] GeForce FX (NV3x) [ 44.824] GeForce 6 (NV4x) [ 44.824] GeForce 7 (G7x) [ 44.824] GeForce 8 (G8x) [ 44.824] GeForce GTX 200 (NVA0) [ 44.824] GeForce GTX 400 (NVC0) [ 44.824] (II) modesetting: Driver for Modesetting Kernel Drivers: kms [ 44.824] (II) FBDEV: driver for framebuffer: fbdev [ 44.824] (II) VESA: driver for VESA chipsets: vesa [ 44.824] (++) using VT number 7 [ 44.835] (EE) [drm] KMS not enabled [ 44.835] (EE) open /dev/dri/card0: No such file or directory [ 44.835] (WW) Falling back to old probe method for modesetting [ 44.835] (EE) open /dev/dri/card0: No such file or directory [ 44.835] (II) Loading sub module "fbdevhw" ... Thanks. -- Jaime Alberto Silva Colorado <http://www.sgautomatizacion.com>http://jaimealsilva.com
