Arch Linux

hakunamatata

Member

Registered: 2016-03-31

Posts: 36

Skylake 6th Generation Bootup Freeze

I installed Arch on a Lenovo ThinkPad t460s. It is the NVMe PCI SSD version with a i7 6600U CPU and HD 520 Graphics. For the installation process I strictly followed the Beginner's Guide. First I installed the xorg-server, xorg-server-utils, xf86-video-intel and xf86-input-synaptics packages. As a DE I installed GNOME (gnome package). So far, everything went well, and I started installing a few packages for daily use. However, after some time I realized that it sometimes (seems randomly) hangs/freezes during bootup. The screen stays black and I have to press the powerbutton for several seconds to turn it off.

Any idea what might be the problem here?

aliena

Member

Registered: 2015-10-09

Posts: 29

Re: Skylake 6th Generation Bootup Freeze

So what actually works if the system hangs?

Does it start the boot loader? Which one do you have?

If systemd starts (the program showing the many green OK messages) are there any failing messages?

hakunamatata

Member

Registered: 2016-03-31

Posts: 36

Re: Skylake 6th Generation Bootup Freeze

I am using the systemd boot loader. I don't see the menu with the boot entries, so I'd guess it doesn't start the boot loader.

Unfortunately, systemd doesn't start. I literally get no output, the screen just stays black.

konfuzius

Member

Registered: 2016-04-04

Posts: 3

Re: Skylake 6th Generation Bootup Freeze

I think, i use the same model: Lenovo T460s 20FAS05P00
But I use KDE, not Gnome.

Right now I cannot confirm your observation. I have no Problems during bootup.
I had some problems with external monitors and freezes, but I think I solved them.

As a boot loader I use grub with some special boot parameters, but I doesn't activated the UEFI-Support.

hakunamatata

Member

Registered: 2016-03-31

Posts: 36

Re: Skylake 6th Generation Bootup Freeze

Are you using the xf86-video-intel driver or not?

konfuzius

Member

Registered: 2016-04-04

Posts: 3

Re: Skylake 6th Generation Bootup Freeze

yes, I use the xf86-video-intel driver i915 with

Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
        Option      "DRI"       "false"
        Option      "NoAccel"   "True"
EndSection

in /etc/X11/xorg.conf.d/20-intel.conf
and the kernel boot parameters

i915.enable_rc6=0 intel_pstate=no_hwp

GourdCaptain

Member

Registered: 2009-04-18

Posts: 121

Re: Skylake 6th Generation Bootup Freeze

i915.enable_rc6=0 intel_pstate=no_hwp

I am having similar random freezes at boot (either a lengthy unreadable kernel panic I'm still trying to figure out how to capture, or a General Protection Fault) on my Lenovo Yoga 700 (11-inch) with a Skylake Core m5 6Y54 CPU (Intel 515 graphics), but I did get around needing to shut down all those powersaving features by running linux-mainline kernel - 4.6 (both in rc1 and now rc2) has a fix for the issue requiring intel_pstate=no_hwp and the c-state disabling. (It will probably get backported to stable kernels at some point.)

Last edited by GourdCaptain (2016-04-04 22:42:34)

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Avatar by Ditey: https://twitter.com/phrobitey

Fallback

Member

From: Austria

Registered: 2009-12-26

Posts: 25

Re: Skylake 6th Generation Bootup Freeze

I also use the T460s no problems with arch booting up also UEFI.  Using the lastest linux-mainline kernel 4.6 from AUR solved many problems like drag and drop with trackpadbuttons and systemfeerzing when closing the lid.

hakunamatata

Member

Registered: 2016-03-31

Posts: 36

Re: Skylake 6th Generation Bootup Freeze

Are you using the intel video driver as well? Any special boot parameters?

GourdCaptain

Member

Registered: 2009-04-18

Posts: 121

Re: Skylake 6th Generation Bootup Freeze

Are you using the intel video driver as well? Any special boot parameters?

I am using the Intel video driver, but my system is rock solid stable so far once it successfully boots on 4.6rc2-mainline. The only kernel arguments I am using are the standard root partition location stuff, and the flag to tell it which BTRFS subvolume root is on.

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Avatar by Ditey: https://twitter.com/phrobitey

Fallback

Member

From: Austria

Registered: 2009-12-26

Posts: 25

Re: Skylake 6th Generation Bootup Freeze

Are you using the intel video driver as well? Any special boot parameters?

Yes I'm using the extra/libva-intel-driver extra/xf86-video-intel also libinput instant of synaptics.

kernel line in bootloader:

options cryptdevice=/dev/sdxy:main:allow-discards root=/dev/mapper/main-root rw lang=de locale=de_DE.UTF-8 resume=/dev/mapper/main-swap intel_pstate=no_hwp

will try it without intel_pstate=no_hwp soon. 4.6 kernel

Files in /etc/X11/xorg.conf.d if anyone interested:

./10-keyboard.conf
Section "InputClass"
        Identifier "keyboard"
        MatchIsKeyboard "yes"
	Option "XkbLayout" "de"
	Option "XkbVariant" "nodeadkeys"        
EndSection

./20-thinkpad.conf
Section "InputClass"
    Identifier	"Trackpoint Wheel Emulation"
    MatchProduct	"TPPS/2 IBM TrackPoint"
    MatchDevicePath	"/dev/input/event*"
    Option		"EmulateWheel"		"true"
    Option		"EmulateWheelButton"	"2"
    Option		"Emulate3Buttons"	"false"
    Option		"XAxisMapping"		"6 7"
    Option		"YAxisMapping"		"4 5"
EndSection

./20-intel.conf
Section "Device"
	Identifier  "Intel Graphics"
	Driver      "intel"
EndSection
./99-libinput.conf

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
	Option "Tapping" "on"
	Option  "AccelSpeed"    "0.25"
	Option  "AccelProfile"  "flat"
	# Option  "ScrollMethod"  "twofinger"	
	# Option "ClickMethod" "clickfinger"
EndSection

___________
/etc/udev/rules.d
./10-trackpoint.rules
ACTION=="add", SUBSYSTEM=="input", ATTR{name}=="TPPS/2 IBM TrackPoint", ATTR{device/sensitivity}="250"