Red Hat Bugzilla – Bug 61095
XFree86 w/ AGP radeon can hang system on ES45
Last modified: 2014-03-16 22:26:06 EDT
Description of Problem: Using XFree86 with 'modprobe agpgart' patch, starting XFree86 on an AGP AlphaServer ES45 can hang the system. Version-Release number of selected component (if applicable): How Reproducible: sometimes Steps to Reproduce: 1. start x 2. if it works, reboot and start x again 3. Actual Results: some of the time the system hangs, other times X starts with DRI correctly Expected Results: X start with DRI always Additional Information: Haven't been able to reproduce the problem with this line in /etc/modules.conf: pre-install radeon (/sbin/modprobe agpgart; /bin/true) which is the way that I was loading the agpgart driver without the 'modprobe agpgart' patch
I'm guessing here ... Kudzu needs to detect 1) AGP exists, 2) a radion card exists shovel in the above line Phil =--=
That's just a hack. The normal way X works (i.e., to load the agpgart module) should 'just work'; it indicates a bug somewhere in the kernel drivers.
my bad. I found the problem (pmd/pte_alloc without page_table_lock held). I will attach a kernel patch this afternoon.
Created attachment 48705 [details] acquire page_table_lock around page remap
Humm,... partially successful. core_titan.c no longer has titan_remap_area_pte() nor titan_remap_area_pmd() Wanna give that another shot? I've made the current srpm available on alpha7.crl.dec.com:~bryce (look for patch126 in the spec file) (kernel-2.4.9-32.1.src.rpm) ie rpm -ivh kernel-2.4.9-32.1.src.rpm cd /usr/src/redhat/SPECS rpm -bp kernel-2.4.spec cd /usr/src/redhat/BUILD/kernel-2.4/linux That at least will give you a 'native' src tree to work against. Phil =--=
the _remap functions are added to core_titan in the main titan patch (133), so this one needs to be applied after that.
This will be fixed in the next release.