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Date: Fri, 25 Jul 2008 10:43:34 +0100 From: Jonathan McDowell <noodles@...th.li> To: dri-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org Subject: X "Hangs" with RS690 + 2.6.26 Hi. I've started to see "hangs" with X on an ATI RS690 with a 2.6.26 kernel. The symptoms are that load average goes up, X stops accepting keypresses or mouse clicks, but the cursor still moves around the screen in response to the mouse being moved. I can't switch to a VT but can ssh in remotely to see that things are still running. I don't seem to be able to kill X but "shutdown -r now" cleanly reboots. gdb fails to attach - complains about an internal error. strace shows lots of ioctls against the DRM device all returning EBUSY. 2.6.25 appears to work fine. I originally had PAT enabled under 2.6.26 but have seen a patch fixing that go into git, so disabled it for my 2.6.26 kernel to see if that was the issue; no change AFAICT. Enabling DRM debug (echo 1 > /sys/module/drm/parameters/debug) gives lots of output from radeon_freelist_get, after the following ioctl is received: Jul 25 10:11:14 meepok kernel: [drm:drm_ioctl] pid=3302, cmd=0xc0406429, nr=0x29 , dev 0xe200, auth=1 and then a returning NULL message. radeon driver is recent git - 1c5858484da4fb1c9bc3ac3b4d7a97863ab99730 but I've seen it with older revisions too. It can take a couple of days for me to hit the problem, so a git bisect could be a lengthy process. If anyone has any suggestions about faster ways to track down the issue I'd like to hear them. Machine is a dual core AMD64 with 4GB of RAM running Debian unstable, card is: 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS690 [Radeon X1200 Series] [1002:791e] Kernel configs at: http://the.earth.li/~noodles/radeon-2.6.26-hang/config-2.6.25 http://the.earth.li/~noodles/radeon-2.6.26-hang/config-2.6.26 Debug log from enabling drm debug: http://the.earth.li/~noodles/radeon-2.6.26-hang/debug Full dmesg (no obvious errors): http://the.earth.li/~noodles/radeon-2.6.26-hang/meepok.dmesg Xorg log file (no obvious errors): http://the.earth.li/~noodles/radeon-2.6.26-hang/Xorg.0.log J. -- "I put it down to corrosive groin sweat myself." -- John Burnham, asr This .sig brought to you by the letter N and the number 39 Product of the Republic of HuggieTag -- 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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