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Re: Debian seems unable to drive my (4) monitors



I have been able to make them *both* work (using custom xorg.conf), but not *at the same time* (under debian)

The working setup (linixmint) does not appear to use any proprietary driver (i.e.: it uses nouveau for NVidia).

I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in case they give some hint.

TiA
MAuro


Il 22/11/2015 13:03, Richard Owlett ha scritto:
On 11/22/2015 5:46 AM, Mauro Condarelli wrote:
I have a setup with two video cards (intel HD Graphics 4600 +
NVidia GeForce GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of
course) only two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(

Yesterday I discovered another data point:
Linuxmint (I tested the "live" distribution) can drive all my
monitors, apparently with no configuration at all (no
/etc/X11/xorg.conf or similar).

LMDE (Linux Mint Debian Edition - essentially the same
distribution, but based on Debian instead of Ubuntu) has the same
problems of plain debian.

Which card does *NOT* work? Does it require a non-free driver?
[My Debian machine is a laptop so I never used multiple monitors]




I *suspect* problem comes from different options enabled (kernel
config?), but I have no idea how to debug such a thing.

I did a dump of lspci and lsmod on the working (lm) system and my
next move will be to get a similar dump on the non
working(debian) setup.
Is there anything else I should check?
As said: the working system has no explicit xorg configuration.

Please help me; I would hate to leave debian world (I was here
since the beginnings, coming from slackware to "buzz").

Regards
Mauro




Module                  Size  Used by
intel_rapl             20480  0 
iosf_mbi               16384  1 intel_rapl
x86_pkg_temp_thermal    16384  0 
intel_powerclamp       20480  0 
coretemp               16384  0 
arc4                   16384  2 
joydev                 20480  0 
kvm_intel             151552  0 
ath9k                 147456  0 
kvm                   479232  1 kvm_intel
ath9k_common           32768  1 ath9k
snd_hda_codec_hdmi     53248  2 
snd_hda_codec_realtek    81920  1 
snd_hda_codec_generic    69632  1 snd_hda_codec_realtek
ath9k_hw              458752  2 ath9k_common,ath9k
dm_crypt               24576  0 
snd_hda_intel          36864  8 snd_hda_codec_hdmi
hid_generic            16384  0 
snd_hda_controller     32768  1 snd_hda_intel
pl2303                 20480  0 
usbhid                 53248  0 
snd_hda_codec         143360  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
usbserial              49152  1 pl2303
ath                    32768  3 ath9k_common,ath9k,ath9k_hw
hid                   110592  2 hid_generic,usbhid
mac80211              708608  1 ath9k
snd_hwdep              20480  1 snd_hda_codec
crct10dif_pclmul       16384  0 
crc32_pclmul           16384  0 
snd_pcm               106496  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
eeepc_wmi              16384  0 
ghash_clmulni_intel    16384  0 
asus_wmi               24576  1 eeepc_wmi
aesni_intel           172032  0 
snd_seq_midi           16384  0 
sparse_keymap          16384  1 asus_wmi
snd_seq_midi_event     16384  1 snd_seq_midi
snd_rawmidi            32768  1 snd_seq_midi
bnep                   20480  2 
aes_x86_64             20480  2 aesni_intel
lrw                    16384  1 aesni_intel
snd_seq                65536  2 snd_seq_midi_event,snd_seq_midi
ath3k                  20480  0 
cfg80211              524288  4 ath,ath9k_common,ath9k,mac80211
btusb                  40960  0 
gf128mul               16384  1 lrw
rfcomm                 69632  8 
snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi
glue_helper            16384  1 aesni_intel
mei_me                 20480  0 
dm_multipath           24576  0 
bluetooth             491520  23 bnep,ath3k,btusb,rfcomm
snd_timer              32768  2 snd_pcm,snd_seq
ablk_helper            16384  1 aesni_intel
scsi_dh                16384  1 dm_multipath
mei                    90112  1 mei_me
soc_button_array       16384  0 
serio_raw              16384  0 
cryptd                 20480  3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd                    86016  25 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
mac_hid                16384  0 
soundcore              16384  2 snd,snd_hda_codec
lpc_ich                24576  0 
shpchp                 40960  0 
tpm_infineon           20480  0 
parport_pc             32768  0 
ppdev                  20480  0 
lp                     20480  0 
parport                45056  3 lp,ppdev,parport_pc
binfmt_misc            20480  1 
squashfs               49152  1 
overlay                45056  1 
nls_iso8859_1          16384  1 
dm_mirror              24576  0 
dm_region_hash         24576  1 dm_mirror
dm_log                 20480  2 dm_region_hash,dm_mirror
uas                    24576  0 
usb_storage            69632  2 uas
nouveau              1368064  3 
i915                 1048576  2 
mxm_wmi                16384  1 nouveau
ttm                    94208  1 nouveau
psmouse               114688  0 
i2c_algo_bit           16384  2 i915,nouveau
drm_kms_helper        126976  2 i915,nouveau
e1000e                237568  0 
ahci                   36864  1 
drm                   344064  8 ttm,i915,drm_kms_helper,nouveau
libahci                32768  1 ahci
ptp                    20480  1 e1000e
pps_core               20480  1 ptp
wmi                    20480  3 mxm_wmi,nouveau,asus_wmi
video                  20480  3 i915,nouveau,asus_wmi

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