On Mon, Oct 21, 2002 at 05:14:28PM -0400, David Dawes wrote: > On Fri, Oct 18, 2002 at 08:38:22AM +0100, Philip Blacker wrote: > >>> I'm wondering if it's feasible for the kernel to route ACPI power
[...] > Does it make a difference if you switch to a text VT before initiating > a suspend? That's how XFree86 handles APM suspend/resume. With a > correctly implemented VTEnter(), the driver should then reinitalise the > hardware correctly when switching back to the X server after resuming. > Some drivers don't to enough hw state initialisation in their VTEnter() > function to handle returning from suspend. > > All of this assumes that the BIOS (and OS?) put the video hardware back > into a sane text console state -- ideally the same state as after a > normal system boot. If that doesn't happen, then there are likely to > be problems. No difference. It is already a common trick for swsusp people. I don't see anything in the code that could explain why a perticular xaa extension is no more functionnal for this card. For me, VTEnter() from the nv driver seems to be correct. [...] > >Another way to solve the problem is to start another Xserver on another > >display then kill it. This probably does the reset that should come > >though APM. > > > >Is there a way for a user space program to signal to the X server that > >a suspend is about to happen or that a resume has happend to enable > >this reset to be done more cleanly. > > Currently the X server only monitors the APM device for power management > events. > > If swsusp can use some equivalent of apmd (or acpid), it should be > possible to have that daemon force a VT switch on suspend, and switch > back on resume (using chvt(1) as I suggested above). > > >I think adding ACPI support to XFree86 is the way to go rather than a > >user space deamon. Kernel 2.4.20 is going to have a (almost) fully > >working ACPI implementation, the swsusp patch will still be needed for > >S4(suspend to disk), S1 (suspend to RAM) will work on some machines. > > What's the current state of acpid? Nothing is done from swsusp to send power management notifications to user space before suspension. The same apply for ACPI. -- Ducrot Bruno http://www.poupinou.org Page profaissionelle http://toto.tu-me-saoules.com Haume page _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
