[11:31] <alkisg> Hi, in Ubuntu 18.04, several schools reported having black screen with i915 after recent updates. With a quick look, I couldn't pinpoint anything, and booting with an older kernel didn't fix the issue. Has anyone reported this?
[11:32] <alkisg> systemctl --failed shows gpu-manager and lightdm as failed; but Xorg.0.log doesn't show any errors.
[11:37] <ricotz> alkisg, maybe the mesa hwe update?
[11:37] <ricotz> (and libdrm)
[11:39] <tjaalton> kernel
[11:39] <tjaalton> 4.15.0-44 was buggy
[11:40] <alkisg> ricotz: all my schools are using 18.04.1 fully updated, which means no hwe stack,
[11:41] <alkisg> tjaalton: they have the issue with -45 as well
[11:41] <ricotz> alkisg, mesa 18.2.2-0ubuntu1~18.04.1 is basically an hwe update
[11:42] <alkisg> Ah, that goes to people without the hwe stack too? That might be it, then
[11:42] <alkisg> I even tried with 4.15.0.20.23 and it didn't make any difference
[11:42] <ricotz> yes, together with libdrm
[11:43] <ricotz> https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1798597
[11:43] <alkisg> Nomodeset did seem to workaround the problem; I'm not sure what this does to i915-based cards
[11:43] <tjaalton> disables everythign
[11:43] <tjaalton> doesn't even load i915
[11:43] <tjaalton> try 18.2.8 from the x-updates ppa
[11:44] <alkisg> Thank you, will do tomorrow, when I'll be able to contact one of those schools again
[11:44] <tjaalton> https://launchpad.net/~ubuntu-x-swat/+archive/ubuntu/updates
[11:44] <tjaalton> it's on the sru queue
[11:44] <tjaalton> as well
[11:44] <ricotz> alkisg, may I ask which intel gpu fails?
[11:45] <alkisg> Let me see if I kept the model in the irc chat...
[11:45]  * ricotz didn't update ltsp systems to bionic yet, but is planning to
[11:46] <alkisg> From? 16.04?
[11:46] <alkisg> 18.04 is much more stable than 16.04, if you use the greek schools ppa
[11:46] <ricotz> yes, currently on xenial
[11:46] <alkisg> I think this was the xorg log, booted with nomodeset: https://termbin.com/vz2e
[11:46] <alkisg>  srv-6gym-chalk, yes, that was the one
[11:47] <tjaalton> doesn't show anything
[11:48] <alkisg> Ugh yeah nomodeset hides the model :(
[11:48] <tjaalton> about the hw
[11:48] <tjaalton> lspci would
[11:51] <alkisg> (unfortnately I don't have that now), PCI:*(0:0:2:0) 8086:1912:1462:7996 rev 6, => https://pci-ids.ucw.cz/read/PC/8086/1912 => Name: Intel® HD Graphics 530 
[11:52] <tjaalton> skylake