Hi Dariusz, I do not see any 3.13 kernel in you ppa? Is it the same as the one with the 3.16 release? I am willing to give it a go,
Kind regards, Vincent On Mon, Nov 3, 2014 at 1:35 PM, Dariusz Gadomski <1104...@bugs.launchpad.net > wrote: > ** Description changed: > > + SRU Justification: > + > + Impact: Many users expect the possibility to use the DP1.2 MST feature > which > + enables them to use a number of different display setups: daisy-chaining > + DP1.2 displays, some 4K displays appearing as 2 separate displays, 3D > displays. > + This however is not supported in Ubuntu stable kernel. > + > + Fix: A series of 18 cherry-picks from v3.17 kernel backported to v3.16 by > + the original author of the feature: David Airlie. > + > + Regression Potential: These patches were merged upstream in v3.17 > without any > + reported regressions. > + > + Original description: > + > I have two recent DisplayPort monitors, both supporting the 1.2 version > of the standard and one containing an MST hub (DELL 2913WM). > > I have an Intel Haswell based NUC connected over mini-displayport to the > display containing the hub, then the second display is plugged in that > one over DisplayPort. > > DisplayPort 1.2 is enabled on the display containing the hub and the > second display lights up fine but just works as a clone of the first > display, without ever showing up in xrandr, dmesg or any other useful > logs I could find. > > My understanding of MST is that the second display should show up as DP2 > on my laptop so I can configure it as I would any other display. > > UPDATE: Updated the bug report after it was pointed out that the > original test hardware, a Lenovo x230 isn't DP 1.2 capable. The same > test on hardware also fails, due to missing support for MST in the > driver. > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1104230 > > Title: > DisplayPort 1.2 MST support is missing in the Intel driver > > Status in X.org xf86-video-intel: > Unknown > Status in “xserver-xorg-video-intel” package in Ubuntu: > Confirmed > > Bug description: > SRU Justification: > > Impact: Many users expect the possibility to use the DP1.2 MST feature > which > enables them to use a number of different display setups: daisy-chaining > DP1.2 displays, some 4K displays appearing as 2 separate displays, 3D > displays. > This however is not supported in Ubuntu stable kernel. > > Fix: A series of 18 cherry-picks from v3.17 kernel backported to v3.16 by > the original author of the feature: David Airlie. > > Regression Potential: These patches were merged upstream in v3.17 > without any > reported regressions. > > Original description: > > I have two recent DisplayPort monitors, both supporting the 1.2 > version of the standard and one containing an MST hub (DELL 2913WM). > > I have an Intel Haswell based NUC connected over mini-displayport to > the display containing the hub, then the second display is plugged in > that one over DisplayPort. > > DisplayPort 1.2 is enabled on the display containing the hub and the > second display lights up fine but just works as a clone of the first > display, without ever showing up in xrandr, dmesg or any other useful > logs I could find. > > My understanding of MST is that the second display should show up as > DP2 on my laptop so I can configure it as I would any other display. > > UPDATE: Updated the bug report after it was pointed out that the > original test hardware, a Lenovo x230 isn't DP 1.2 capable. The same > test on hardware also fails, due to missing support for MST in the > driver. > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1104230/+subscriptions > -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1104230 Title: DisplayPort 1.2 MST support is missing in the Intel driver To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1104230/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
