Date: Thu, 26 Mar 2009 01:15:36 +0100 From: "Paul B. Mahol" <onemda@gmail.com> To: Daniel Thiele <dthiele@gmx.net> Cc: Gustau Perez <gperez@entel.upc.edu>, Jung-uk Kim <jkim@freebsd.org>, freebsd-current@freebsd.org Subject: Re: [HEADSUP] amd64 suspend/resume code to be comitted Message-ID: <3a142e750903251715t4088654euf3b2adcd0587d2cd@mail.gmail.com> In-Reply-To: <49CAC6FB.5060503@gmx.net> References: <1236802980.00085518.1236789602@10.7.7.3> <200903241528.34902.jkim@FreeBSD.org> <49CAA201.7000205@entel.upc.edu> <200903251833.14825.jkim@FreeBSD.org> <49CAC6FB.5060503@gmx.net>
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On 3/26/09, Daniel Thiele <dthiele@gmx.net> wrote: > Jung-uk Kim wrote: >> On Wednesday 25 March 2009 05:28 pm, Gustau Perez wrote: >>>> Please try the attached patch, which just disables restoring VGA >>>> state while resuming. >>> Tried your patch again, and this time using hw.acpi.reset_video, >>> hw.acpi.suspend_bounce and friends. The same result, the screen >>> remains completely black. >>> >>> Before appliying the patch, when resuming the screen showed >>> messages about the resume of some hardware (usb, firewire, etc ...) >>> and then it went black. >>> >>> Is there anything I can test ? >> >> Then, it is something else, e.g., acpi_video(4). You can try setting >> debug.acpi.disabled="video" in /boot/loader.conf for example. >> > > I have the same problem here with a ThinkPad T400. This is a model with > the Switchable Graphics feature, but I set the corresponding BIOS option > to use the integrated Intel GMA X4500 only. Suspend and resume seem to > work except for video output. I am using a vanilla CURRENT from March 25 > (so I have not tried the vga_isa.diff patch yet). > > As in Gustau's case, after resume the screen stays just black. The > system, though, seems to be up and running, since I get console's > audible bell when I expect it and I can edit files, blindly of course. > Setting debug.acpi.disabled="video" in /boot/loader.conf produces the > same result: A black screen right after resume. > > I also tried setting hw.acpi.reset_video to 1 but the the machine does > not resume at all. When I, in this case, additionally turn on > debug.acpi.resume_beep all I get is a long beep that only stops, if I > power-cycle the machine. > > Also, at first I tried to use an USB flash drive to test suspend/resume > on amd64, which results in a panic on suspend. Unfortunately, I don't > have any dumps, but the "tracing pid" output from "where" at the > debugger prompt reported PID 12, wich seems to be [intr]. Or at leas it > seem to be intr whenever I look up PID 12. Right now I am (ab)using my > swap partition, which works fine. > > So, if there are any other knobs to fiddle with or patches to try out > to investigate this further (at least the black screen issue) just let > me know. The only way I managed (without suspending while inside X11) my HP nx7300 on UP i386 to resume with video working is kldloading vesa before suspend. -- Paul
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