Lenovo y510p - Intel card is not detected

Question

Hello,
Recently I bought Lenovo y510p laptop in that configuration:
Lenovo Y510p
Intel Core i7 4700MQ
RAM 8 GB ( 1 x 8 GB ) 1600 MHz / PC3-12800
1TB HDD, 8gb SSD
NVIDIAGeForce GT 755M
After some problems I installed Arch on it. I had problems with black screen on start. After all I wanted to install drivers for Nvidia Optimus. But when I typed `lspci` I got that response:
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:01.1 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x8 Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)
00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d5)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM86 Express LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMoBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 755M] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)
07:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 755M] (rev a1)
08:00.0 Ethernet controller: Qualcomm Atheros QCA8171 Gigabit Ethernet (rev 10)
09:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)
First thing I noticed is that my CPU is detected as Xeon, not i7 and there is no line with Intel VGA. But in /proc/cpuinfo` this CPU is detected as i7:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 60
model name      : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
stepping        : 3
microcode       : 0x12
cpu MHz         : 2921.156
cache size      : 6144 KB
physical id     : 0
siblings        : 8
core id         : 0
cpu cores       : 4
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid
bogomips        : 4791.76
clflush size    : 64
cache_alignment : 64
address sizes   : 39 bits physical, 48 bits virtual
power management:
// and rest till 7th proessor
Thanks for all answers.
Last edited by grzlus (2014-08-29 16:34:55)

Answer 1

You mean you don't have a Nvidia card in the UltraBay? And Windows shows 2 Nvidia GPUs and Intel GPU at the same time?
Have you checked BIOS/UEFI settings? From what I read, this thing has a hardware mux, so even with just one Nvidia GPU it's possible to switch between Intel/Nvidia/Optimus. But I couldn't tell if this can be done in BIOS/UEFI or if it requires some more magic that's done from Windows.