[Bug 53385] [GM45] i915: render error detected - Invalid GTT entry during fetch for host

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=53385

--- Comment #47 from andreas.sturmlechner at gmail.com ---
(In reply to comment #46)
> Andreas, what's the situation with current drm-intel-nightly?

I just tried the latest state of drm-intel-nightly on the setup that's troubled
by bug 57461 and bug 69251 (external display via DisplayPort), and it's got a
bit worse:


1.) System freezes every time that - presumably - EDID is accessed. At first
there's a noticeable black screen delay between grub2 and init, then it
proceeds fine to the login manager, all seems fine at that point.

2.) That 5-6 seconds freeze (total lock, any input is lost) then happens each
time I switch between fbcon and login manager, and doing that I can soon
provoke the following error in dmesg:

[   66.836072] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit
banging on pin 5

3.) Starting the desktop environment results in a multitude of those freezes,
presumably because KDE tries to detect and find out a few things about display
capabilities, color management and whatnot, startup is considerably delayed by
that.

4.) How to reproduce the freeze:

~ $ time oyranos-monitor -l
0: ":0.0" 1920,00x1200,00+0,00+0,00  S2243W

real    0m6.230s
user    0m0.034s
sys     0m0.033s

5.) During first startup of the new kernel image I also got an 'hpd interrupt
storm' in dmesg, a few restarts later a familiar error has reappeared:

[  457.189291] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  457.189296] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  457.189297] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  457.189299] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  457.189300] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  457.190004] i915: render error detected, EIR: 0x00000010
[  457.190004] i915:   IPEIR: 0x00000000
[  457.190004] i915:   IPEHR: 0x54c00006
[  457.190004] i915:   INSTDONE_0: 0x808f837f
[  457.190004] i915:   INSTDONE_1: 0xbf2706ae
[  457.190004] i915:   INSTDONE_2: 0x00000000
[  457.190004] i915:   INSTDONE_3: 0x00000000
[  457.190004] i915:   INSTPS: 0x8001e025
[  457.190004] i915:   ACTHD: 0x01bcb45c
[  457.190004] i915: page table error
[  457.190004] i915:   PGTBL_ER: 0x00000001
[  457.190004] [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010,
masking

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