[Bug 98735] New: Inconsistent Boot Time Error Reported: "Boot Time Error Reported: "drm:i915_gem_init-stolen""

Tue Nov 15 10:50:13 UTC 2016

https://bugs.freedesktop.org/show_bug.cgi?id=98735

            Bug ID: 98735
           Summary: Inconsistent Boot Time Error Reported: "Boot Time
                    Error Reported: "drm:i915_gem_init-stolen""
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sad_bunny at hotmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

I've just encountered a remarkably interesting error when attempting to boot my
computer to run Mint Linux 18.0 (Sarah) 64-Bit. I think I might have a rough
idea of the problem [more detail below] but first here is a little information
about the platform on which I see this... 

Hardware: Asus z170i Motherboard / Intel Core i7 6700T CPU / 16Gb RAM / 1Tb
Samsung 850 Pro SSD 

OS Configuration: Windows 10 Pro, 64-Bit / Mint 18.0, 64-Bit - dual-booting
using the Mint grub bootloader 

Hard Drive Configuraiton [Partitions]:-

1. System Reserved [500Mb]
2. C: NTFS Windows primary partition [512Gb]
3. / [16Gb]
4. {swap{ [16Gb]
5. /usr [16Gb]
6. /home [16Gb]
7. /var [16Gb]
8. /tmp [8Gb]
9. /media/local {D:} [357Gb]

Observation:-
Perform a routine power-on boot into Mint. Either wait for grub to time-out, or
select and then press enter for "default" Mint initiation... Screen initially
shows the Mint Logo and the row of dots which change between green and white in
colour, then the screen clears and I observe [in what I take to be console
font] the following text:-

[ 1.377121] [drm:i915_gem_init-stolen [i915_bpo]] *ERROR* conflict detected
with stolen region:
[0xc6000000 - oxc8000000]
Welcome to emergency mode! After logging in, type "journalctl -xb" to view
system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to try
again to boot into default mode.

Give root password for maintenance (or press Ctrl-D to continue):

If I then type in "systemctl reboot" I go back to the Mint Logo, but this time
there is a new message displayed centre-screen, immediately beneath the logo,
which reads,

"Unattended-upgrade in progress during shutdown, sleeping for 5s"

But... I have not asked this computer to perform any unattended updates. Pretty
much every time I boot Mint, I check "update Manager" and perform necessary
updates... I am 99.99999% confident that there were no "background" updates
being performed by this system. 

Having gained access via the root password, if I explore the system I can see a
few running processes and that, for example, etc/fstab has not yet been
parsed... 

The Windows 10 partition appears [so far] to be unaffected by this

Suspicion:-

I wonder if this might actually relate to the Video Driver? [Hence my posting
it here...] Specifically, I see the reference which says,
"[drm:i915_gem_init-stolen [i915_bpo]]" and I wonder if this in some way
relates to the Digital Rights Management functionality built into the HDMI
interface? Could there be something between the interaction with the HDMI
driver within the Intel Graphics Driver for Linux that is tripping up here?

The issue seems to manifest during a "cold boot", i.e. from power up. However,
once observed, I am able to circumvent the issue by:-

1. Power recycle reboot
2. Select Windows 10 from the grub menu
3. Let Windows 10 Load
4. Request a reboot
5. Upon reaching the grub menu for a second time, let default [Mint 18.0] load

Current high level config as follows:- 

$ uname -a

Linux skylake 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

Further System Details:-

$ inxi -v6

System:    Host: skylake Kernel: 4.4.0-21-generic x86_64 (64 bit gcc: 5.3.1)

           Desktop: Cinnamon 3.0.7 (Gtk 3.18.9-1ubuntu3.1) dm: mdm Distro:
Linux Mint 18 Sarah

Machine:   Mobo: ASUSTeK model: Z170I PRO GAMING v: Rev X.0x Bios: American
Megatrends v: 2002 date: 09/19/2016

CPU:       Quad core Intel Core i7-6700T (-HT-MCP-) cache: 8192 KB

           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22466

           clock speeds: min/max: 800/3600 MHz 1: 799 MHz 2: 1182 MHz 3: 799
MHz 4: 2849 MHz 5: 1580 MHz

           6: 2034 MHz 7: 1100 MHz 8: 880 MHz

Memory:    No dmidecode memory data: try newer kernel.

Graphics:  Card: Intel Sky Lake Integrated Graphics bus-ID: 00:02.0 chip-ID:
8086:1912

           Display Server: X.Org 1.18.3 drivers: intel (unloaded: fbdev,vesa)

           Resolution: 1920x1200 at 59.95hz, 1920x1200 at 59.95hz

           GLX Renderer: Mesa DRI Intel HD Graphics 530 (Skylake GT2)

           GLX Version: 3.0 Mesa 11.2.0 Direct Rendering: Yes

Audio:     Card Intel Sunrise Point-H HD Audio driver: snd_hda_intel bus-ID:
00:1f.3 chip-ID: 8086:a170

           Sound: Advanced Linux Sound Architecture v: k4.4.0-21-generic

Network:   Card-1: Intel Ethernet Connection (2) I219-V

           driver: e1000e v: 3.2.6-k bus-ID: 00:1f.6 chip-ID: 8086:15b8

           IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac:
f8:32:e4:9a:87:f5

           Card-2: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter

           driver: ath10k_pci bus-ID: 04:00.0 chip-ID: 168c:003e

           IF: wlp4s0 state: down mac: 30:52:cb:21:aa:bf

Any suggestions gratefully received... Happy to provide more system information
if needed to help with triage...

Thank you,

C

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