Re: kern/53795: i915drmkms causes crash on boot with Atom N270/945GSE netbook

[Elliott Shue <elliott1787%gmail.com@localhost>]

The following reply was made to PR kern/53795; it has been noted by GNATS.

From: Elliott Shue <elliott1787%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/53795: i915drmkms causes crash on boot with Atom N270/945GSE netbook
Date: Tue, 18 Dec 2018 11:52:24 -0500

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  >I have an LG X110 that has the same CPU/GPU combo in it. I haven't
  >encountered this particular problem with it, curiously.
 
 I have an Asus EeePC 901 with the same CPU/GPU, it boots fine with the
 stock kernel as well.
 
 It is a slightly weird netbook, but shouldn't be too far from the
 basic Atom N270 system from the time.
 
 
 > Hopefully you'll get better results with it.
 
 Definitely a different result. Still garbage on the screen, but the
 system actually boots.
 
 Before the HD activity light would stop and any key press would cause a beep.
 
 Now I've got ssh access and can maybe provide more useful information.
 
 [   6.8815928] kern.module.path=/stand/i386/8.99.27/modules
 [   6.8815928] kern info: [drm] Memory usable by graphics device = 256M
 [   6.8815928] kern info: [drm] Supports vblank timestamp caching Rev
 2 (21.10.2013).
 [   6.8815928] kern info: [drm] Driver supports precise vblank timestamp query.
 [   6.8815928] kern info: [drm] failed to find VBIOS tables
 [   6.8815928] i915drmkms0: interrupting at ioapic0 pin 16 (i915drmkms0)
 [   6.9116124] kern info: [drm] initialized overlay support
 [   6.9816621] kern info: [drm] GMBUS [i915 gmbus vga] timed out,
 falling back to bit banging on pin 2
 [   7.2418458] intelfb0 at i915drmkms0
 [   7.2418458] intelfb0: framebuffer at 0xdc167000, size 640x480,
 depth 32, stride 2560
 [   7.9723633] kern error:
 [drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_display.c:12659)intel_pipe_config_compare]
 *ERROR* mismatch in base.adjusted_mode.flags(DRM_MODE_FLAG_PHSYNC)
 (expected 0, found 1)
 [   7.9723633] kern error:
 [drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_display.c:12663)intel_pipe_config_compare]
 *ERROR* mismatch in base.adjusted_mode.flags(DRM_MODE_FLAG_PVSYNC)
 (expected 0, found 4)
 [   7.9723633] warning:
 /usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_display.c:12899:
 pipe state doesn't match!
 [   8.0123934] wsdisplay0 at intelfb0 kbdmux 1: console (default,
 vt100 emulation), using wskbd0
 [   8.0338052] wsmux1: connecting to wsdisplay0
 
 Complete dmesg here:
 https://pastebin.com/K5k1p6JX
 
 Any other information I could provide?
 
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 <div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><pre> &=
 gt;I have an LG X110 that has the same CPU/GPU combo in it. I haven&#39;t
  &gt;encountered this particular problem with it, curiously.<br><br></pre><=
 pre>I have an Asus EeePC 901 with the same CPU/GPU, it boots fine with the =
 stock kernel as well. <br></pre><pre>It is a slightly weird netbook, but sh=
 ouldn&#39;t be too far from the basic Atom N270 system from the time.<br></=
 pre><pre><br>&gt; Hopefully you&#39;ll get better results with it.<br><br><=
 /pre><pre>Definitely a different result. Still garbage on the screen, but t=
 he system actually boots. <br></pre><pre>Before the HD activity light would=
  stop and any key press would cause a beep. <br></pre><pre>Now I&#39;ve got=
  ssh access and can maybe provide more useful information.<br><br>[   6.881=
 5928] kern.module.path=3D/stand/i386/8.99.27/modules<br>[   6.8815928] kern=
  info: [drm] Memory usable by graphics device =3D 256M<br>[   6.8815928] ke=
 rn info: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).<br>[  =
  6.8815928] kern info: [drm] Driver supports precise vblank timestamp query=
 .<br>[   6.8815928] kern info: [drm] failed to find VBIOS tables<br>[   6.8=
 815928] i915drmkms0: interrupting at ioapic0 pin 16 (i915drmkms0)<br>[   6.=
 9116124] kern info: [drm] initialized overlay support<br>[   6.9816621] ker=
 n info: [drm] GMBUS [i915 gmbus vga] timed out, falling back to bit banging=
  on pin 2<br>[   7.2418458] intelfb0 at i915drmkms0<br>[   7.2418458] intel=
 fb0: framebuffer at 0xdc167000, size 640x480, depth 32, stride 2560<br>[   =
 7.9723633] kern error: [drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/i=
 ntel_display.c:12659)intel_pipe_config_compare] *ERROR* mismatch in base.ad=
 justed_mode.flags(DRM_MODE_FLAG_PHSYNC) (expected 0, found 1)<br>[   7.9723=
 633] kern error: [drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_d=
 isplay.c:12663)intel_pipe_config_compare] *ERROR* mismatch in base.adjusted=
 _mode.flags(DRM_MODE_FLAG_PVSYNC) (expected 0, found 4)<br>[   7.9723633] w=
 arning: /usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_display.c:12899:=
  pipe state doesn&#39;t match!<br>[   8.0123934] wsdisplay0 at intelfb0 kbd=
 mux 1: console (default, vt100 emulation), using wskbd0<br>[   8.0338052] w=
 smux1: connecting to wsdisplay0<br><br>Complete dmesg here:<br><a href=3D"h=
 ttps://pastebin.com/K5k1p6JX">https://pastebin.com/K5k1p6JX</a><br><br></pr=
 e><pre>Any other information I could provide?<br></pre><pre><br><br></pre><=
 pre><br></pre></div></div></div></div>
 
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