Date: Wed, 04 Sep 2013 12:52:36 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: John Baldwin <jhb@freebsd.org> Cc: Laura Marie Feeney <lmfeeney@sics.se>, freebsd-acpi <freebsd-acpi@freebsd.org>, Kevin Oberman <rkoberman@gmail.com>, Gleb Smirnoff <glebius@freebsd.org>, "Sergey A. Osokin" <osa@FreeBSD.org>, =?ISO-8859-1?Q?Jean-S=E9bastien_P=E9dron?= <dumbbell@FreeBSD.org> Subject: Re: suspend/resume on Lenovo X1 (regression from reports on wiki) Message-ID: <52276554.6020807@FreeBSD.org> In-Reply-To: <201309040929.35903.jhb@freebsd.org> References: <521D03AE.3050709@sics.se> <201309031647.47650.jhb@freebsd.org> <522669AF.5000209@FreeBSD.org> <201309040929.35903.jhb@freebsd.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2013-09-04 09:29:35 -0400, John Baldwin wrote: > On Tuesday, September 03, 2013 6:58:55 pm Jung-uk Kim wrote: >> On 2013-09-03 16:47:47 -0400, John Baldwin wrote: >>> Even with that hacked so I force vgapm0 and dpms0 to attach, I >>> still can't resume in console mode, ... >> >> What happens? Does it panic, hang, or just no backlight? > > Just no backlight. It resumes fine and if I do it in multiuser I > can ssh in, etc. It's just the backlight that doesn't resume. I > was hopeful dpms.ko would fix that, but it didn't. :( Ah, that's a well-known problem and we cannot fix it without help of machine-specific code, e.g., drm1/drm2. Actually, both acpi_video and dpms try to restore video settings but nothing worked for Intel GPUs + LVDS + LCD panel AFAIK. > I think i915drm has code to specifically turn on the backlight as > I get some weird error message in the kernel console about a > timeout trying to turn the panel off during suspend when I'm in X. So, I guess it has an ordering issue. If my memory serves, drm1 was okay with vesa, however. I *think* it accidentally worked because of automatic VT-switching, which is still broken for KMS. Jung-uk Kim -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.21 (FreeBSD) iQEcBAEBAgAGBQJSJ2VUAAoJECXpabHZMqHOJtgIAIagXbUGDBGR6cdu1EncP8bU eN+03coO4KBsCuFesNkOBF8GgCsoGf+n+IrUjGnazuyK9UTi5flLMieg3TpIkGrL YxOTTo6hfMswII8c5B67ZqPjvY/EmhgQdCQ34WsUGptDvUnqq23u3ounOiQY75iu FXJqQf5s1X6M5a5bzgvfWZd8yhJhUoYsrQftFOpiZBx1Xyb6hrfCRUJquQklx1Y8 zFDVYm6zr34Aan/lHOWTjAI2ZWBFeiu6BswWdFy2BCbKUUh5b9tToBikfsBRWmSn isgnm4y8NNDlz/wY42eoXvGFonJLH6+lR7sasxQayIZU7bkfrLlgs9SBex1vh4g= =dj+e -----END PGP SIGNATURE-----
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