3) I just tested it and it works. But I am not sure if I am using the noveau or intel driver right now (I think it must be noveau, since thinkpad can only output via the discrete card to external screens as far as I know and since it is listed in lsmod:

Module                  Size  Used by
pci_stub               16384  1
vboxpci                24576  0
vboxnetadp             28672  0
vboxnetflt             28672  0
vboxdrv               454656  3 vboxnetadp,vboxnetflt,vboxpci
binfmt_misc            20480  1
nls_iso8859_1          16384  1
intel_rapl             20480  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             172032  0
kvm                   536576  1 kvm_intel
irqbypass              16384  1 kvm
arc4                   16384  2
joydev                 20480  0
rtl8192ce              57344  0
rtl_pci                28672  1 rtl8192ce
input_leds             16384  0
rtl8192c_common        53248  1 rtl8192ce
serio_raw              16384  0
rtlwifi                77824  3 rtl_pci,rtl8192c_common,rtl8192ce
mac80211              737280  3 rtl_pci,rtlwifi,rtl8192ce
cfg80211              565248  2 mac80211,rtlwifi
lpc_ich                24576  0
snd_hda_codec_realtek    86016  1
snd_hda_codec_generic    77824  1 snd_hda_codec_realtek
snd_hda_intel          36864  3
snd_hda_codec         135168  3 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_intel
snd_hda_core           73728  4 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep              16384  1 snd_hda_codec
snd_pcm               106496  3 snd_hda_codec,snd_hda_intel,snd_hda_core
snd_seq_midi           16384  0
snd_seq_midi_event     16384  1 snd_seq_midi
snd_rawmidi            32768  1 snd_seq_midi
snd_seq                69632  2 snd_seq_midi_event,snd_seq_midi
thinkpad_acpi          90112  1
nvram                  16384  1 thinkpad_acpi
snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              32768  2 snd_pcm,snd_seq
snd                    81920  17 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device
mac_hid                16384  0
mei_me                 36864  0
soundcore              16384  1 snd
shpchp                 36864  0
mei                    98304  1 mei_me
parport_pc             32768  0
ppdev                  20480  0
lp                     20480  0
parport                49152  3 lp,ppdev,parport_pc
autofs4                40960  2
jitterentropy_rng      16384  0
drbg                   32768  1
ansi_cprng             16384  0
algif_skcipher         20480  0
af_alg                 16384  1 algif_skcipher
dm_crypt               28672  1
mmc_block              36864  0
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
aesni_intel           167936  2
aes_x86_64             20480  1 aesni_intel
lrw                    16384  1 aesni_intel
gf128mul               16384  1 lrw
glue_helper            16384  1 aesni_intel
ablk_helper            16384  1 aesni_intel
cryptd                 20480  3 aesni_intel,ablk_helper
psmouse               126976  0
i915                 1208320  2
pata_acpi              16384  0
nouveau              1495040  1
e1000e                237568  0
ptp                    20480  1 e1000e
mxm_wmi                16384  1 nouveau
ttm                    94208  1 nouveau
i2c_algo_bit           16384  2 i915,nouveau
pps_core               20480  1 ptp
drm_kms_helper        147456  2 i915,nouveau
firewire_ohci          40960  0
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
firewire_core          65536  1 firewire_ohci
sysimgblt              16384  1 drm_kms_helper
crc_itu_t              16384  1 firewire_core
fb_sys_fops            16384  1 drm_kms_helper
sdhci_pci              28672  0
sdhci                  45056  1 sdhci_pci
drm                   360448  7 ttm,i915,drm_kms_helper,nouveau
wmi                    20480  2 mxm_wmi,nouveau
fjes                   28672  0
video                  40960  3 i915,thinkpad_acpi,nouveau