please close bug seems fixed - it was necessary to unplug power cord from monitor (not only switch off by power switch [real one, not a button on front side]). Once off for 5mins and started linux on mainstream found new hw:
[ 5508.498513] HDMI hot plug event: Codec=3 Pin=4 Presence_Detect=1 ELD_Valid=1 [ 5508.499486] HDMI status: Codec=3 Pin=4 Presence_Detect=1 ELD_Valid=1 [ 5508.795982] HDMI status: Codec=3 Pin=4 Presence_Detect=1 ELD_Valid=1 [ 5508.801199] HDMI: detected monitor HP ZR2440w at connection type DisplayPort [ 5508.801202] HDMI: available speakers: FL/FR [ 5508.801206] HDMI: supports coding type LPCM: channels = 2, rates = 32000 44100 48000, bits = 16 20 24 Seems this will be the issue of HP ZR2440w -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/963422 Title: No signal via DisplayPort - kernel 2.6.38-13-generic-pae #57-Ubuntu SMP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/963422/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
