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Date: Fri, 04 Apr 2008 22:27:31 -0400 From: Mark Lord <lkml@....ca> To: "Rafael J. Wysocki" <rjw@...k.pl> Cc: LKML <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, david-b@...bell.net, oliver@...kum.org, Alan Stern <stern@...land.harvard.edu> Subject: Re: 2.6.25-rc7/8: Another resume regression Mark Lord wrote: > Hi, > > Okay, USB now works fine on resume after fixing the iaa_watchdog issue. > > But twice now, once before that fix, and again just a minute ago, > my machine has failed completely to resume after suspend-to-RAM. > > Again, resume here is 100% reliable in 2.6.24 and earlier. > > Symptoms: the usual: > > -- 2.6.25-rc8 (and -rc7 earlier), plus USB fix. > -- not reproduceable on demand. > -- black screen of death -- no backlight, no kernel messages. > -- no hard drive activity. > -- no alt-sysrq-anything. > -- 5 second hold of the power button to poweroff and then recover. > > Not much info to go on, but it's worth knowing there's an issue here > somewhere. .. Mmmm... Now that 2.6.25-rc* is usable here, there's another symptom that's been happening regularly enough that it's got to be a regression of some sort. This machine has an ATI X1400 video card, which doesn't work with any open source X server that I know of. Maybe latest RadeonHD would work but it didn't when I tried it in January. So I'm using the ATI binary fglrx X server, but without their kernel module, so no 3D acceleration (fine.. only affects Google Earth, really). Now.. on 2.6.25, after a suspend/resume cycle (or three), the framebuffer frequently starts going wonky. "snowy" pixels appear, and stay. Just a moment ago here, the entire background changed to zebra stripes. And so on.. Peculiar stuff. I'm wondering if something to do with video mode switching, or video register save/restore, has changed since 2.6.24. Because it's broken in 2.6.25, yet works fine in all earlier kernels. ??? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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