No support for switchable IGP/GPU
Macbook Pro 15 Retina Late 2013 uses explicitly dedicated GPU (NVIDIA
GeForce GT 750M).
Integrated graphic processor isn’t listed at all.
Result: Not being able to switch or turn off discrete card to improve battery life.
Tails 1.3 (Debian/Wheezy)
Have Intel Iris Pro graphics processors supported by the kernel
and therefore be able to switch off the discrete one.
Be able to hardcode this solution into the kernel of Tails by myself
to use explicitly the IGP (Intel Iris Pro Graphics)
Macbook Pro Retina 15 Late 2013
Intel Iris Pro Graphics
NVIDIA GeForce GT 750M with 2GB of GDDR5 memory and automatic graphics switching
01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fe9 (rev a1) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Device 0130
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at c0000000 (32-bit, non-prefetchable) [size=16M]
Memory at 80000000 (64-bit, prefetchable) [size=256M]
Memory at 90000000 (64-bit, prefetchable) [size=32M]
I/O ports at 1000 [size=128]
Expansion ROM at c1000000 [disabled] [size=512K]
Capabilities:  Power Management version 3
Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities:  Express Endpoint, MSI 00
Capabilities: [b4] Vendor Specific Information: Len=14 <?>
Capabilities:  Virtual Channel
Capabilities:  Power Budgeting <?>
Capabilities:  Advanced Error Reporting
Capabilities:  Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
Capabilities:  #19
Kernel driver in use: nouveau
Linux version 3.16.0-4-amd64 (firstname.lastname@example.org) (gcc version 4.8.4 (Debian 4.8.4-1) ) #1 SMP Debian 3.16.7-ckt4-3 (2015-02-03)
There are many services like vgaswitcheroo, acpi_call etc.
However, none of them can work if the IGP (in this case Intel Iris Pro is not listed at all - or recognized by the system?)
- Related to #7505 (closed)