Hi, Fernando 2009/5/26 Fernando Herrero Carrón <[email protected]>: > Hi list, > > I would like to ask for some help debugging the kernel. > > Here is the problem: > > I have a computer about five years old with an on-board graphics card > (SiS 661). I am trying to install an ATI Radeon 128 on the AGP port. > FreeBSD (FreeBSD 7.2-STABLE #10: Tue May 26 15:08:39 CEST 2009) is able > to start DRM and AGP without trouble. However, whenever I start X (X.Org > X Server 1.6.1; Release Date: 2009-4-14; Build Date: 11 May 2009 > 12:03:27PM) the system freezes with a blank screen with some apparent > noisy green dots on it (reproducible, however). It does not panic, nor > reboot. > > Now I suspect there is some problem on the AGP bridge driver since linux > can run X without trouble (i.e. hardware and BIOS are ok). I have found > someone reporting problems with this bridge long time ago with no > answers (http://www.nabble.com/agp-on-sis-661-td1446998.html). > > So here I am trying to figure out where the system freezes. I have > recompiled my kernel adding the following options: > > options KDB > options DDB > options MP_WATCHDOG > options SW_WATCHDOG > > I am able to enter the debugger with ctrl+alt+esc from a console. So > what I am trying to do is to have watchdogd time out and the debugger > make a dump: > > ddb script kern.enter.watchdog=call doadump; reboot > > However, when I start X no timeout occurs, and the system stays freezed. > Am I missing something on the workings of watchdogd? >
What you're describing does not appear to be a kernel problem; it sounds like the typical 'Xorg update from hell' problem most experienced a while back. Have a look at /usr/ports/UPDATING, and search for 'AllowEmptyInput'. Adding the following to xorg.conf should correct the problem: Section "ServerFlags" option "AllowEmptyInput" "off" option "AutoAddDevices" "off" EndSection HTH -- Glen Barber _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[email protected]"
