Arch Linux

Untribium

Member

Registered: 2015-01-07

Posts: 10

Black Screen (~10sec) on login/logoff on daisy chained monitors

Hey guys

In my setup, I have 2 daisy chained Dell U2414H monitors on the DisplayPort output of my nVidia GTX 760 . They work mostly fine, but I'm getting a roughly 10 seconds delay (black screen) at login and logout. This seems to be an issue with the Intel iGPU, as described on the wiki here. However, the strange thing is, that the black screen only occurs when using both monitors in the daisy chain config (regardless of DP1.2 setting on second monitor). Using one monitor on either HDMI or DisplayPort and even using both, one on HDMI and one on DP, works perfectly fine.

Any ideas? I might just end up buying an HDMI cable and be done with it, but I'd like to have as few cables going to my monitors as possible
Thanks!

This is my /etc/modprobe.d/blacklist.conf

#disable Intel iGPU
install i915 /usr/bin/false
install intel_agp /usr/bin/false

#disable WiFi
install rtl8821ae /usr/bin/false

Some outputs that might be relevant:

# lsmod | grep intel                                                                                                                                                                                                                               :(
intel_rapl             17356  0 
intel_powerclamp       17122  0 
crc32c_intel           21809  0 
ghash_clmulni_intel    12978  0 
aesni_intel           163855  1 
aes_x86_64             16719  1 aesni_intel
lrw                    12757  1 aesni_intel
glue_helper            12649  1 aesni_intel
ablk_helper            12572  1 aesni_intel
cryptd                 18553  3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd_hda_intel          26387  5 
snd_hda_controller     26938  1 snd_hda_intel
snd_hda_codec         108536  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_pcm                88487  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd                    73436  18 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel

# lsmod | grep i915 
no output

# lspci | grep VGA  
01:00.0 VGA compatible controller: NVIDIA Corporation GK104 [GeForce GTX 760] (rev a1)