The VT switching lockup problem with DRI is different from the one (AMD 761) discussed lately. The XFree CVS or RH73 code has the fix for that one, see http://www.geocrawler.com/lists/3/SourceForge/2634/25/8680261/. This one (VT switching lockup with DRI) has been haunting us for a while. It appears to be hardware (Agp chipset) related. Unfortunately I can't reproduce this problem on all my boxes. There are a few things you can try to narrow the problem down: 1. What is the agp mode used by drmAgpEnable call? This should already be in your log file -- search for '[agp] Mode' line. 2. Try to verify if the lockup happens in RADEONCP_START call (from RADEONEnterVT in radeon_driver.c). If you can still remote login or do a hot reboot after the lockup, this can be easily verified by adding some log messages around that call. Also what does the dmesg say after the lockup? 3. Since you can see some drawings, the lockup seems to happen later (after the CP_START call). If that's the case, try to add some delay (sleep(1)) before and after RADEONCP_START in RADEONEnterVT. If it doesn't help, you can add a "return;" right after "a->sync = ..." in RADEONCPAccelInit of radeon_accel.c. This will disable all 2D acceleration routines, just to see if it can make any difference.
Hui ----- Original Message ----- From: "Wayne Whitney" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, May 25, 2002 10:55 AM Subject: [Dri-devel] Status of AMD 760MP + Radeon lockups? > Hello, > > I noticed a thread in April, 2002 about DRI lockups people were seeing > when using a Radeon card with the AMD 760MP chipset. I didn't see a > resolution, though, and as I am seeing the same thing now, I wanted to ask > what the status is. > > I'm using a Radeon VE QY with a Tyan S2460 motherboard, and whenever I > enable DRI, switching from a text console back to X causes X to lockup. > (But the kernel is OK, I can use Alt-Sysrq.) The screen shows the > expected contents except for a rectangle of garbage near the top. I don't > have a different video card to try, but if I disable DRI, or if I use an > AMD 760MPX based motherboard (Asus A7M266-D), the problem goes away. > FWIW, the BIOS update pages on the Tyan S2460 and S2462 (the only AMD > 760MP motherboards available) both show that earlier versions of the BIOS > had a problem with Radeon cards reinitializing the display on warm boots. > I don't know if this former 760MP + Radeon BIOS problem is related to the > current 760MP + Radeon DRI problem. > > I noticed the following Changelog entry in the xfree86.org CVS: "114. > Fixes for DRI lockup problems with Radeon 7500/VE and the AMD 761 chipset > (Hui Yu@ATI)." Of course, the AMD 760MP uses the AMD 762 northbridge, but > I thought this might be related. So I compiled the latest xfree86 CVS and > tried it. I'm running kernel 2.5.15-dj2, so I also grabbed kernel 2.5.18, > which includes a DRI CVS merge, and used the drivers/char/drm code from it > to compile the kernel DRM module. Unfortunately, this combination still > shows the lockups. > > Any other suggestions on what to try? Or is there further information I > should provide? I noticed that in the April thread, the person reporting > the problem eventually provide a trace from a static X server, but I > didn't see a response after that. If it would be helpful to have another > trace, I could try to capture one. > > Thanks, > Wayne > > > > _______________________________________________________________ > > Don't miss the 2002 Sprint PCS Application Developer's Conference > August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm > > _______________________________________________ > Dri-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/dri-devel > _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
