[Bug 101753] [SKL] XOrg server hangs during start if intel driver is selected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101753

--- Comment #22 from m_pashka <m_pashka at mail.ru> ---
Using netconsole is pretty useless unless there is a way to change boot order.
Currently netconsole is loaded after video drivers and system halts during
video drivers loading. E.g. in working configuration (with nvidia performance
mode selected):
[    1.707407] [drm] Memory usable by graphics device = 4096M
[    1.707709] checking generic (b0000000 1e0000) vs hw (b0000000 10000000)
[    1.708054] fb: switching to inteldrmfb from EFI VGA
[    1.708403] Console: switching to colour dummy device 80x25
[    1.708554] [drm] Replacing VGA console driver
[    1.714193] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.714196] [drm] Driver supports precise vblank timestamp query.
[    1.716190] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    1.716543] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_26.bin
(v1.26)
[    1.724953] [drm] Initialized i915 1.6.0 20171023 for 0000:00:02.0 on minor
0
...
[    1.761861] PKCS#7 signature not signed with a trusted key
[    1.761870] nvidia: loading out-of-tree module taints kernel.
[    1.761894] nvidia: module license 'NVIDIA' taints kernel.
[    1.761895] Disabling lock debugging due to kernel taint
[    1.763968] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[    1.764520] nvidia: module verification failed: signature and/or required
key missing - tainting kernel
[    1.769146] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input4
[    1.769321] ACPI: Video Device [PEGP] (multi-head: no  rom: yes  post: no)
[    1.769378] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:12/LNXVIDEO:01/input/input5
[    1.770521] nvidia-nvlink: Nvlink Core is being initialized, major device
number 240
[    1.770894] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  390.77  Tue Jul
10 18:28:52 PDT 2018 (using threaded interrupts)
[    1.776813] PKCS#7 signature not signed with a trusted key
[    1.777825] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for
UNIX platforms  390.77  Tue Jul 10 22:10:46 PDT 2018
[    1.778356] PKCS#7 signature not signed with a trusted key
[    1.778968] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[    1.778973] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on
minor 1
[    1.794467] fbcon: inteldrmfb (fb0) is primary device
...
[    2.908825] Console: switching to colour frame buffer device 480x135
[    2.936886] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
...
[    3.214398] netpoll: netconsole: local port 6666
[    3.214418] netpoll: netconsole: local IPv4 address 192.168.1.20
[    3.214434] netpoll: netconsole: interface 'enp3s0f1'
[    3.214448] netpoll: netconsole: remote port 6666
[    3.214460] netpoll: netconsole: remote IPv4 address 192.168.1.46
[    3.214476] netpoll: netconsole: remote ethernet address 48:5d:60:62:b9:88
[    3.214505] netpoll: netconsole: device enp3s0f1 not up yet, forcing it
[    3.262223] r8169 0000:03:00.1 enp3s0f1: link down
[    3.262224] r8169 0000:03:00.1 enp3s0f1: link down
[    3.262336] IPv6: ADDRCONF(NETDEV_UP): enp3s0f1: link is not ready
[    7.272204] netpoll: netconsole: timeout waiting for carrier
[    7.362513] console [netcon0] enabled
[    7.362536] netconsole: network logging started


So in case of selecting intel power saving prime profile system hangs during
loading video dirvers before starting netconsole.

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