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Dears, I installed the 4.4 rc7 kernel on my ubuntu 15.10 following this page github.com/awesomebytes/ubuntu14_dell_xps13_9350 just replacing code for rc6 with code for rc7.

when installing I got an error message that i915 was not found, as this seems linked to 3D acceleration, I am a bit worried that I am loosing some performance. What could/should I do ?

according to first comment I now installed rc8, I still used the same install script as in the link above.

Here is the output

Sélection du paquet linux-headers-4.4.0-040400rc8 précédemment
désélectionné. (Lecture de la base de données... 291800 fichiers et
répertoires déjà installés.) Préparation du dépaquetage de
linux-headers-4.4.0-040400rc8_4.4.0-040400rc8.201601051225_all.deb ...
Dépaquetage de linux-headers-4.4.0-040400rc8
(4.4.0-040400rc8.201601051225) ... Sélection du paquet
linux-headers-4.4.0-040400rc8-generic précédemment désélectionné.
Préparation du dépaquetage de
linux-headers-4.4.0-040400rc8-generic_4.4.0-040400rc8.201601051225_amd64.deb
... Dépaquetage de linux-headers-4.4.0-040400rc8-generic
(4.4.0-040400rc8.201601051225) ... Sélection du paquet
linux-image-4.4.0-040400rc8-generic précédemment désélectionné.
Préparation du dépaquetage de
linux-image-4.4.0-040400rc8-generic_4.4.0-040400rc8.201601051225_amd64.deb
... Done. Dépaquetage de linux-image-4.4.0-040400rc8-generic
(4.4.0-040400rc8.201601051225) ... Paramétrage de
linux-headers-4.4.0-040400rc8 (4.4.0-040400rc8.201601051225) ...
Paramétrage de linux-headers-4.4.0-040400rc8-generic
(4.4.0-040400rc8.201601051225) ... Examining
/etc/kernel/header_postinst.d. run-parts: executing
/etc/kernel/header_postinst.d/dkms 4.4.0-040400rc8-generic
/boot/vmlinuz-4.4.0-040400rc8-generic : Unable to find an initial ram
disk that I know how to handle. Will not try to make an initrd. :
Unable to find an initial ram disk that I know how to handle. Will not
try to make an initrd. Error! Problems with depmod detected. 
Automatically uninstalling this module. DKMS: Install Failed (depmod
problems).  Module rolled back to built state. Paramétrage de
linux-image-4.4.0-040400rc8-generic (4.4.0-040400rc8.201601051225) ...
Running depmod. update-initramfs: deferring update (hook will be
called later) Examining /etc/kernel/postinst.d. run-parts: executing
/etc/kernel/postinst.d/apt-auto-removal 4.4.0-040400rc8-generic
/boot/vmlinuz-4.4.0-040400rc8-generic run-parts: executing
/etc/kernel/postinst.d/dkms 4.4.0-040400rc8-generic
/boot/vmlinuz-4.4.0-040400rc8-generic : Unable to find an initial ram
disk that I know how to handle. Will not try to make an initrd.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools
4.4.0-040400rc8-generic /boot/vmlinuz-4.4.0-040400rc8-generic update-initramfs: Generating /boot/initrd.img-4.4.0-040400rc8-generic
W: Possible missing firmware /lib/firmware/i915/skl_guc_ver4.bin for
module i915 run-parts: executing /etc/kernel/postinst.d/pm-utils
4.4.0-040400rc8-generic /boot/vmlinuz-4.4.0-040400rc8-generic run-parts: executing /etc/kernel/postinst.d/unattended-upgrades
4.4.0-040400rc8-generic /boot/vmlinuz-4.4.0-040400rc8-generic run-parts: executing /etc/kernel/postinst.d/update-notifier
4.4.0-040400rc8-generic /boot/vmlinuz-4.4.0-040400rc8-generic run-parts: executing /etc/kernel/postinst.d/zz-update-grub
4.4.0-040400rc8-generic /boot/vmlinuz-4.4.0-040400rc8-generic Création du fichier de configuration GRUB… Attention : Définir GRUB_TIMEOUT à
une valeur non nulle si GRUB_HIDDEN_TIMEOUT est définie n’est plus
possible. Image Linux trouvée : /boot/vmlinuz-4.4.0-040400rc8-generic
Image mémoire initiale trouvée :
/boot/initrd.img-4.4.0-040400rc8-generic Image Linux trouvée :
/boot/vmlinuz-4.4.0-040400rc7-generic Image mémoire initiale trouvée :
/boot/initrd.img-4.4.0-040400rc7-generic Image Linux trouvée :
/boot/vmlinuz-4.2.0-23-generic Image mémoire initiale trouvée :
/boot/initrd.img-4.2.0-23-generic Image Linux trouvée :
/boot/vmlinuz-4.2.0-22-generic Image mémoire initiale trouvée :
/boot/initrd.img-4.2.0-22-generic Image Linux trouvée :
/boot/vmlinuz-4.2.0-16-generic Image mémoire initiale trouvée :
/boot/initrd.img-4.2.0-16-generic Found memtest86+ image:
/memtest86+.elf Found memtest86+ image: /memtest86+.bin fait

Installing BCM4350 driver Adding initramfs rules to load i915
(graphics) and nvme (SSD) update-initramfs: Generating
/boot/initrd.img-4.4.0-040400rc8-generic W: Possible missing firmware
/lib/firmware/i915/skl_guc_ver4.bin for module i915 update-initramfs:
Generating /boot/initrd.img-4.4.0-040400rc7-generic W: Possible
missing firmware /lib/firmware/i915/skl_guc_ver4.bin for module i915
update-initramfs: Generating /boot/initrd.img-4.2.0-23-generic
update-initramfs: Generating /boot/initrd.img-4.2.0-22-generic
update-initramfs: Generating /boot/initrd.img-4.2.0-16-generic Done,
now you can reboot (maybe you'll need to do it twice).

It seems that the i915 is at the end of the script on this part

sudo bash -c "echo 'i915
nvme' >> /etc/initramfs-tools/modules"
sudo update-initramfs -u -k all

It also yields some more issues before as well, but which seems less of a worry (DKMS is driver for the usb wifi dongle which I don't need anymore).

Thx, Timothé

Doug Smythies
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Timothe Jahan
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  • Try Kernel 4.4-rc8. Due to some issues there was a delay before they got posted on the mainline ppa. However, the successful rc8 builds just got posted about an hour ago. – Doug Smythies Jan 05 '16 at 19:31
  • And yes, there are issues with suspend. For one example (there are a few), see here – Doug Smythies Jan 05 '16 at 19:38
  • Could you edit your question and add the exact error message text. You should have this file: /lib/modules/4.4.0-040400rc7-generic/kernel/drivers/gpu/drm/i915/i915.ko – Doug Smythies Jan 05 '16 at 19:54
  • Hi I did not mark down the error at the point I installed the kernel. I do have the i915.ko file and I get some results when doing modinfo i915.ko, but nothing that looks like a logfile. Note, this comment is with the rc7 – Timothe Jahan Jan 07 '16 at 18:07
  • I do not think the file skl_guc_ver4.bin is included in 15.10 linux-firmware. It is included in 16.04 linux-firmware. I do not know if this is your root issue or not. – Doug Smythies Jan 07 '16 at 22:04
  • I have been late (need of full reinstall due to windows). I now run the released 4.4 kernel and I still have the same issue. I noticed that in vlc I cannot use the "overlay" mode for video, very likely due to the same issue. I also have trouble in other video program, so any help would be appreciated. Regarding the skl... file I indeed only have the ver1, not the ver4, should I do something about it ? – Timothe Jahan Jan 18 '16 at 07:16
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    I'm voting to close this question as off-topic because custom kernels are off topic. – David Foerster Feb 03 '16 at 07:04
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    How is this off-topic? It is because lack of hardware support of current Ubuntu (not +1, not non-supported) that we have to go custom kernel. It could be tagged as not "official" kernel, but shouldn't be off-topic, should it? – Dolanor Feb 17 '16 at 11:34

2 Answers2

1

I could solve the error, by downloading the missing module here: https://01.org/linuxgraphics/downloads/sklgucver43

Unfortunately I am doubtfull this solves everything, play I play avideo in VLC with graphics acceleration (overlay mode), I can still not resize the video, but I will open a separate request for this.

Timothé

Timothe Jahan
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  • This actually fixed my long-lasting problem with VLC, and now the video resizes well! – Ho1 Mar 03 '16 at 15:44
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I replaced curl with wget and this worked perfectly in regards to Possible missing firmware /lib/firmware/i915/skl_guc_ver4.bin for module i915

curl -O http://de.archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.157_all.deb
dpkg -i linux-firmware_1.157_all.deb
sudo update-initramfs -u -k all

Mario Olivio Flores
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Andre
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