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https://freedesktop.org/bugzilla/show_bug.cgi?id=1833
Summary: use of stencil buffer in resolutions with no hw stencil
may lead to gpu lockup
Product: Mesa
Version: CVS
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Drivers/DRI/r200
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
If the stencil buffer is used in 16bit resolutions, a lockup may happen. I'm not
sure what's the culprit, maybe the swrast fallback has some problems?
This happened on a rv250. To reproduce, edit your xorg config to use a 16bpp
resolution. Start Quake3, enter /r_stencilbits 8, /vid_restart. As soon as
/cg_shadows 2 is entered (which enables stencil shadows), a gpu lockup occurs.
Kernel log showed
Nov 11 20:10:33 ZakTower kernel: [drm:drm_lock_take] *ERROR* 3 holds heavyweight
lock
CVS drm-core module was used.
So maybe it's actually not really a gpu lockup, but some locking trouble...
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