krolaw
6 Indium

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

Instead of restarting to recover wifi, try unpluging from power and suspend and wake again.

However, my touchscreen doesn't come back after sleep and the above didn't help at all.

Cheers.

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yngvewb
1 Copper

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

To get the WiFi back on you can restart the service also with 

sudo service network-manager restart

Still, quite annoying. 

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krolaw
6 Indium

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

That is helpful though.  Any ideas on bringing back the touch screen without a reboot?

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manufacturedba
1 Copper

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

I just got my XPS 9350 a couple of days ago and nothing else resolved GPU hangs except i915.enable_rc6=0.

I'm running Ubuntu 15.10 on Linux 4.5.

Just wanted to confirm the solution and say thank you.

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rgaiacs
1 Copper

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

Hi,

I got my XPS 9350 yesterday and installed ubuntu-gnome-16.04-beta2. I changed

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_rc6=0"


and hope this solve the video problem.

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Highlighted
obbe
1 Nickel

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

I've been using kernel 4.4.6 for the last few days (from Fedora 23) and so far it seems stable. No special boot parameters required.

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jasonbishop88
1 Copper

RE: Ubuntu (daily) 16.04 - 9350 QHD i7 Skylake video freeze

i tried disabling rc6 when i got my xps about a week ago.  it helped a bit but didnt fix completely.

for a complete fix this is what i did:

the archlinux page here wiki.archlinux.org/.../Dell_XPS_13_%282016%29

references this bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94161

there are two patches listed there which you need.

here is how to apply:

edit  and uncomment all of the deb-src lines: sudo vi /etc/apt/sources.list

refresh apt: sudo apt-get update

get kernel sources: apt-get source linux-image-$(uname -r)

goto the i915_bpo driver used by 16.04: cd linux-4.4.0/ubuntu/i915

get first patch: curl -o patch.122643 https://bugs.freedesktop.org/attachment.cgi?id=122663

get second patch: curl -o patch.122644 https://bugs.freedesktop.org/attachment.cgi?id=122664

apply the patches:

patch -p5 < patch.122643
patch -p5 < patch.122644

now build driver (as normal user): make -C /lib/modules/`uname -r`/build M=$PWD modules

sudo cp -p i915_bpo.ko /lib/modules/4.4.0-16-generic/kernel/ubuntu/i915/i915_bpo.ko

update-initramfs

reboot and you should be good to go.  you can now remove the grub change you had done earlier in /etc/default/grub

#GRUB_CMDLINE_LINUX="i915_bpo.enable_rc6=0"
GRUB_CMDLINE_LINUX=""

run sudo update-grub and reboot again

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