Настройка драйвера дисплея GT 720M (Optimus) - Crunchbang Waldorf / Debian Wheezy

После установки Crunchbang 11 (на основе Debian Wheezy) и первой загрузки я вынужден войти в оболочку, поскольку Xorg не запускается Fatal server error: no screens found.

Мой ноутбук оснащен GT 720M на базе Optimus. Nouveau был автоматически установлен во время установки и, похоже, в некоторой степени подхватывает графический процессор:

[ 126.101860] nouveau 0000:04:00.0: setting latency timer to 64 [ 126.101881] [drm] nouveau 0000:04:00.0: Detected an NVd0 generation card (0x0d7000a2) [ 126.105833] [drm] nouveau 0000:04:00.0: Checking PRAMIN for VBIOS [ 126.148715] [drm] nouveau 0000:04:00.0: ... BIOS signature not found [ 126.148718] [drm] nouveau 0000:04:00.0: Checking PROM for VBIOS [ 126.148786] [drm] nouveau 0000:04:00.0: ... BIOS signature not found [ 126.148788] [drm] nouveau 0000:04:00.0: Checking ACPI for VBIOS [ 126.148790] [drm] nouveau 0000:04:00.0: ... BIOS signature not found [ 126.148792] [drm] nouveau 0000:04:00.0: Checking PCIROM for VBIOS [ 126.148891] nouveau 0000:04:00.0: Invalid ROM contents [ 126.149875] [drm] nouveau 0000:04:00.0: ... BIOS signature not found [ 126.149876] [drm] nouveau 0000:04:00.0: No valid VBIOS image found 

Я пытался установить шмель и примус, хотя ни один из них не помог. Optirun, похоже, не может распознать второй GPU (хотя это может быть из-за того, что Xorg не работает):

~$ optirun glxgears [ 625.400763] [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Failed to load module "mouse" (module does not exist, 0)  [ 625.400809] [ERROR]Aborting because fallback start is disabled. 

Утилита lspci:

00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09) 00:03.0 Audio device: Intel Corporation Device 0a0c (rev 09) 00:04.0 Signal processing controller: Intel Corporation Device 0a03 (rev 09) 00:14.0 USB controller: Intel Corporation Lynx Point-LP USB xHCI HC (rev 04) 00:16.0 Communication controller: Intel Corporation Lynx Point-LP HECI #0 (rev 04) 00:1b.0 Audio device: Intel Corporation Lynx Point-LP HD Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 1 (rev e4) 00:1c.2 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 3 (rev e4) 00:1c.3 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 4 (rev e4) 00:1c.4 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 5 (rev e4) 00:1d.0 USB controller: Intel Corporation Lynx Point-LP USB EHCI #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Lynx Point-LP LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Lynx Point-LP SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Lynx Point-LP SMBus Controller (rev 04) 00:1f.6 Signal processing controller: Intel Corporation Lynx Point-LP Thermal (rev 04) 02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5287 (rev 01) 02:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 12) 03:00.0 Network controller: Atheros Communications Inc. AR9485 Wireless Network Adapter (rev 01) 04:00.0 3D controller: NVIDIA Corporation Device 1140 (rev a1) 

/etc/bumblebee/xorg.conf.nouveau:

Section "ServerLayout" Identifier "Layout0" Option "AutoAddDevices" "false" Option "AutoAddGPU" "false" EndSection  Section "Device" Identifier "DiscreteNvidia" Driver "nouveau"  # If the X server does not automatically detect your VGA device, # you can manually set it here. # To get the BusID prop, run `lspci | egrep 'VGA|3D'` and input the data # as you see in the commented example. # This Setting is needed on Ubuntu 13.04. BusID "PCI:04:00:0"  EndSection 

Возможно, стоит отметить, что это система на основе UEFI.