Intel's 3.0 X.Org Driver Has Now Been In Development For Two Years

[e8hffff]

At some point ARM and Intel are going to meet with a one product suits most. If Intel doesn't pick up their game on Linux they risk being claimed by people moving to ARM and possibly Android based computing. Especially if Goggle takes Android in the direction of Desktop Convergence.

[7oby]

I have a Lenovo T440p with a docking station. Especially connecting to or from the docking station gave me many OOPSes all over the board. They were fixed and broken again many times during 4.1-rc, 4.2-rc and especially in drm-intel-nightly however they seem to be resolved - at least for now. Right now the console goes black during bootup. I can login "blind" and fire up X wich seems to work.
[...]This was introduced with the switch to "full" atomic modesetting commit to drm-intel-nightly.

Actually I bought a Lenovo T440p and docking stations just because David Airline who replied to your thread as well uses this notebook and I was hoping for the best Linux intel graphics experience

http://airlied.livejournal.com/79388.html

I did not yet made the switch to atomic modesetting :
- kernel 4.2.0
remaining components are from Kubuntu 14.10:
- xserver-xorg-video-intel 2.99.914-1~exp1ubuntu4.5
- libgl1-mesa-dri 10.3.2-0ubuntu0.1
- xserver-xorg-core 1.16.0-1ubuntu1.3

I skipped kubuntu 15.04 and wait for KDE 5.x to stabilize in Kubuntu 15.10. Hope atomic modesetting is stable until then as well.

kernel 4.1.5 + 4.1.6 was not stable for me:

Aug 11 22:50:33 thinktank kernel: [ 1613.527437]  [<ffffffffc01a2e85>] i915_gem_execbuffer2+0x175/0x2c0 [i915]
Aug 11 22:50:33 thinktank kernel: [ 1613.527469]  [<ffffffffc008fd09>] drm_ioctl+0x379/0x6a0 [drm]

kernel 3.19.8 has been fine though.

[saski]

So are you having any serious problems with stuff not working or just a bunch of backtraces in the log files?

Also are you seeing this on released kernels in the stable series, like 4.1.x?

Dave.

As explained I'm currently experiencing hard lockups and a non working console. The lockups were introduced sometime with the switch to full atomic modeset beginning with the official 4.2-rc releases and drm-intel-nightly. The cosole is broken for about two weeks with drm-intel-nightly.

I have no idea if the backtraces in my dmesg have anything to do with the problems I'm experiencing but they are i915 gem/atomic related. I've filed a new bug (https://bugs.freedesktop.org/show_bug.cgi?id=91912). Hopefully the provided information is sufficient to reproduce the issue. The hard lockups don't show up in the logs unfortunately.

[saski]

Actually I bought a Lenovo T440p and docking stations just because David Airline who replied to your thread as well uses this notebook and I was hoping for the best Linux intel graphics experience

http://airlied.livejournal.com/79388.html

I did not yet made the switch to atomic modesetting :
- kernel 4.2.0
remaining components are from Kubuntu 14.10:
- xserver-xorg-video-intel 2.99.914-1~exp1ubuntu4.5
- libgl1-mesa-dri 10.3.2-0ubuntu0.1
- xserver-xorg-core 1.16.0-1ubuntu1.3

I skipped kubuntu 15.04 and wait for KDE 5.x to stabilize in Kubuntu 15.10. Hope atomic modesetting is stable until then as well.

kernel 4.1.5 + 4.1.6 was not stable for me:

Aug 11 22:50:33 thinktank kernel: [ 1613.527437] [<ffffffffc01a2e85>] i915_gem_execbuffer2+0x175/0x2c0 [i915]
Aug 11 22:50:33 thinktank kernel: [ 1613.527469] [<ffffffffc008fd09>] drm_ioctl+0x379/0x6a0 [drm]

kernel 3.19.8 has been fine though.

If you are running 4.20 there should already be some atomic modesetting active. Can you try to run your T440p on its internal screen? I'm keen to know if someone else hits a hard lockup? Just leave the laptop undocked running idle over night even if the screen switches to dpms. Next morning the machine should be dead .

Kernel 4.0.x is the last series that is stable for me for every day use.

[7oby]

If you are running 4.2.0 there should already be some atomic modesetting active. Can you try to run your T440p on its internal screen? Just leave the laptop undocked running idle over night even if the screen switches to dpms.

I will do this tonight and report here:

Result: no crash over night 09.09. 22:41 - 10.09. 07:30

• nothing suspicious in /var/log/syslog - just WLAN rekeying events every 30min
• keep in mind that my 2D, 3D Stack is older and I'm running KDE 4.14.1 (Kubuntu 14.10)
• 4.2.0 kernel from ubuntu kernel ppa : http://kernel.ubuntu.com/~kernel-ppa/mainline/

I'm not sure wether those new "atomic modesetting" codepaths are activated with my older X.Org and 2D intel-drv driver. At least SNA is activated and sure the latest [drm] kernel module:

# /var/log/Xorg.0.log
[    10.227] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20150522
[    10.227] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.5 (Timo Aaltonen <[email protected]>)
[    10.227] (II) intel(0): SNA compiled for use with valgrind
[...]
[    10.233] (II) intel(0): SNA initialized with Haswell (gen7.5, gt2) backend

# dmesg
[    0.000000] Linux version 4.2.0-040200-generic (kernel@tangerine) (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) ) #201508301530 SMP Sun Aug 30 19:31:40 UTC 2015
[...]
[    1.154404] [drm] Initialized i915 1.6.0 20150522 for 0000:00:02.0 on minor 0

[saski]

Result: no crash over night 09.09. 22:41 - 10.09. 07:30

• nothing suspicious in /var/log/syslog - just WLAN rekeying events every 30min
• keep in mind that my 2D, 3D Stack is older and I'm running KDE 4.14.1 (Kubuntu 14.10)
• 4.2.0 kernel from ubuntu kernel ppa : http://kernel.ubuntu.com/~kernel-ppa/mainline/

Thanks for Trying. Good to know that it's only me as it seems. I'll keep trying with different hardware....