Bug 96278

Summary:

[amdgpu][tonga]Kernel Hung when starting X while detecting outputs

Product:

DRI

Reporter:

frederik <frederik.schwan>

Component:

DRM/AMDgpu

Assignee:

Default DRI bug account <dri-devel>

Status:

RESOLVED FIXED

QA Contact:

Severity:

major

Priority:

medium

CC:

frederik.schwan

Version:

XOrg git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
bad dmesg	none

Description frederik 2016-05-30 16:53:50 UTC

Created attachment 124177 [details]
bad dmesg

Hardware: Dell Precision Laptop 7710 with Intel HD P530 and AMD FirePro W7170M (Amethyst XT)

Kernel: 4.6 and 4.7rc1
xf86-video-amdgpu: 1.1.0

Description:
When X is started, it accepts no connections ("waiting for X server to accept connections") forever. 
There is another bugreport over here [1] that has the same problem with the radeon driver. Dmesg is attached.


The stacktrace seems to be nearly the same:

schedule
rpm_resume
wake_atomic_t_function
__pm_runtime_resume
[amdgpu_connector_dp_detect/radeon_dvi_detect] (output detection)
drm_helper_hpd_irq_event
[amdgpu/radeon]_resume_kms
[amdgpu/radeon]_pmops_runtime_resume
pci_pm_runtime_resume
vga_switcheroo_set_dynamic_switch
vga_switcheroo_runtime_resume
...
...
...

[1] http://unix.stackexchange.com/questions/269223/lightdm-fails-to-load-after-system-upgrade-in-arch-x64

Comment 1 Alex Deucher 2016-06-06 13:59:54 UTC

Does adding amdgpu.runpm=0 to the kernel command line in grub help?

Comment 2 frederik 2016-06-06 14:55:31 UTC

Yes, with that arg there are no hungs anymore. Are there patches for the power management I can test?

Comment 3 Alex Deucher 2016-06-06 15:04:11 UTC

Please try my drm-next-4.8-wip branch which contains a number of fixes for PX systems:
https://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-4.8-wip

Comment 4 frederik 2016-08-08 20:47:34 UTC

Fixed with 4.8rc1

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