Bug 108981 - XPS 15 (9550) Won't boot with 4.4
Summary: XPS 15 (9550) Won't boot with 4.4
Status: RESOLVED DOCUMENTED
Alias: None
Product: Other
Classification: Unclassified
Component: Other (show other bugs)
Hardware: x86-64 Linux
: P1 blocking
Assignee: other_other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-12-07 03:47 UTC by AC
Modified: 2016-10-28 12:37 UTC (History)
1 user (show)

See Also:
Kernel Version: 4.4rc4
Subsystem:
Regression: No
Bisected commit-id:


Attachments
Boot Log (70.84 KB, image/jpeg)
2015-12-07 03:47 UTC, AC
Details
Boot log (1.94 MB, image/jpeg)
2015-12-10 16:13 UTC, AC
Details

Description AC 2015-12-07 03:47:52 UTC
Created attachment 196511 [details]
Boot Log

Nether 4.4rc3 nor 4.3rc4 will boot on my Dell XPS 15 (9550).  4.3 boots fine.

The boot process halts with "ALERT! /dev/disk/by-uuid/<uuid> does not exist", although the UUID does exist, and other kernels boot fine.

I'm attaching a screenshot of the console boot log.  I apologize that it is hard to read, because my screen is 3840x2160 and each line is less that 2mm high.

Here's my grub stanza:

                load_video
                gfxmode $linux_gfx_mode
                insmod gzio
                if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
                insmod part_gpt
                insmod ext2
                if [ x$feature_platform_search_hint = xy ]; then
                  search --no-floppy --fs-uuid --set=root  7e2ed448-28a7-465e-a5b0-58db19b2711a
                else
                  search --no-floppy --fs-uuid --set=root 7e2ed448-28a7-465e-a5b0-58db19b2711a
                fi
                echo    'Loading Linux 4.4.0-040400rc4-generic ...'
                linux   /boot/vmlinuz-4.4.0-040400rc4-generic root=UUID=7e2ed448-28a7-465e-a5b0-58db19b2711a ro  quiet splash i915.preliminary_hw_support=1 i915.enable_ips=0 $vt_handoff
                echo    'Loading initial ramdisk ...'
                initrd  /boot/initrd.img-4.4.0-040400rc4-generic

Possibly related is the following warning when i update-initramfs:

$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.4.0-040400rc4-generic
W: Possible missing firmware /lib/firmware/i915/skl_guc_ver4.bin for module i915

Please let me know what other info would be helpful.  Thanks!
Comment 1 AC 2015-12-10 16:13:55 UTC
Created attachment 197051 [details]
Boot log

Here's a more recent boot log, after installing Skylake firmware, and easier to read
Comment 2 AC 2015-12-17 02:11:05 UTC
Same error with rc5
Comment 3 Johannes Larsen 2015-12-23 06:41:06 UTC
I had similiar problems with Dell 9350 (XPS 13) on archlinux. Adding the nvme (NVM Express, the SSD interface) module to the initramfs (presumably /etc/initramfs-tools/modules on ubuntu) fixed it for me.
Comment 4 AC 2015-12-24 17:13:02 UTC
WooHoo!  That worked.  For the record, I:

- Added "nvme" to the end of /etc/initramfs-tools/modules
- Ran update-initramfs -u
- Rebooted

and am now happily running 4.4rc5.
Comment 5 Jani Nikula 2016-10-28 12:37:43 UTC
Closing.

Please file any drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

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