On Wed, Jun 17, 2026 at 07:35:00PM -0400, [email protected] wrote:
> >Synopsis: Kernel Panic with wsconsctl screen blanking
> >Category: Kernel Panic wsconsctl
> >Environment:
> System : OpenBSD 7.9
> Details : OpenBSD 7.9 (GENERIC) #329: Wed May 6 14:56:46 MDT 2026
>
> [email protected]:/usr/src/sys/arch/i386/compile/GENERIC
>
> Architecture: OpenBSD.i386
> Machine : i386
> >Description:
> After upgrade to 7.9, i386 system panics when wsconsctl enables
> display.screen_off=60000
> display.kbdact=on
> display.vblank=on
> All worked well on past 10 or 20 versions of OpenBSD
> >How-To-Repeat:
> enable wsconsctl with above configuration
> panicing system is a Thinkpad T40
> note: does not affect my Thinkpad X40
> >Fix:
> disable wsconsctl screen blanking
thanks, fix committed to -current
Index: sys/dev/pci/drm/radeon/radeon_drv.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/radeon/radeon_drv.c,v
diff -u -p -r1.22 radeon_drv.c
--- sys/dev/pci/drm/radeon/radeon_drv.c 9 Mar 2026 23:58:03 -0000 1.22
+++ sys/dev/pci/drm/radeon/radeon_drv.c 20 Jun 2026 13:18:12 -0000
@@ -733,6 +733,7 @@ radeondrm_detach_kms(struct device *self
}
void radeondrm_burner(void *, u_int, u_int);
+void radeondrm_burner_cb(void *);
int radeondrm_wsioctl(void *, u_long, caddr_t, int, struct proc *);
paddr_t radeondrm_wsmmap(void *, off_t, int);
int radeondrm_alloc_screen(void *, const struct wsscreen_descr *,
@@ -1265,6 +1266,7 @@ radeondrm_attachhook(struct device *self
const struct drm_format_info *format;
task_set(&rdev->switchtask, radeondrm_doswitch, ri);
+ task_set(&rdev->burner_task, radeondrm_burner_cb, rdev);
/* from linux radeon_pci_probe() */
@@ -1358,4 +1360,37 @@ radeondrm_activate_kms(struct device *se
}
return (rv);
+}
+
+void
+radeondrm_burner(void *v, u_int on, u_int flags)
+{
+ struct rasops_info *ri = v;
+ struct radeon_device *rdev = ri->ri_hw;
+
+ task_del(systq, &rdev->burner_task);
+
+ if (on)
+ rdev->burner_fblank = FB_BLANK_UNBLANK;
+ else {
+ if (flags & WSDISPLAY_BURN_VBLANK)
+ rdev->burner_fblank = FB_BLANK_VSYNC_SUSPEND;
+ else
+ rdev->burner_fblank = FB_BLANK_NORMAL;
+ }
+
+ /*
+ * Setting the DPMS mode may sleep while waiting for vblank so
+ * hand things off to a taskq.
+ */
+ task_add(systq, &rdev->burner_task);
+}
+
+void
+radeondrm_burner_cb(void *arg1)
+{
+ struct radeon_device *rdev = arg1;
+ struct drm_fb_helper *helper = rdev_to_drm(rdev)->fb_helper;
+
+ drm_fb_helper_blank(rdev->burner_fblank, helper->info);
}
Index: sys/dev/pci/drm/radeon/radeon_fbdev.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/drm/radeon/radeon_fbdev.c,v
diff -u -p -r1.5 radeon_fbdev.c
--- sys/dev/pci/drm/radeon/radeon_fbdev.c 9 Mar 2026 23:58:03 -0000
1.5
+++ sys/dev/pci/drm/radeon/radeon_fbdev.c 20 Jun 2026 13:04:58 -0000
@@ -338,36 +338,3 @@ bool radeon_fbdev_robj_is_fb(struct rade
return true;
}
-
-void
-radeondrm_burner(void *v, u_int on, u_int flags)
-{
- struct rasops_info *ri = v;
- struct radeon_device *rdev = ri->ri_hw;
-
- task_del(systq, &rdev->burner_task);
-
- if (on)
- rdev->burner_fblank = FB_BLANK_UNBLANK;
- else {
- if (flags & WSDISPLAY_BURN_VBLANK)
- rdev->burner_fblank = FB_BLANK_VSYNC_SUSPEND;
- else
- rdev->burner_fblank = FB_BLANK_NORMAL;
- }
-
- /*
- * Setting the DPMS mode may sleep while waiting for vblank so
- * hand things off to a taskq.
- */
- task_add(systq, &rdev->burner_task);
-}
-
-void
-radeondrm_burner_cb(void *arg1)
-{
- struct radeon_device *rdev = arg1;
- struct drm_fb_helper *helper = rdev_to_drm(rdev)->fb_helper;
-
- drm_fb_helper_blank(rdev->burner_fblank, helper->info);
-}
