On Fri, 2010-05-21 at 15:02 -0700, Jesse Barnes wrote:
On Sat, 22 May 2010 00:57:30 +0300 Maxim Levitsky maximlevitsky@gmail.com wrote:
On Fri, 2010-05-21 at 00:14 +0300, Maxim Levitsky wrote:
On Thu, 2010-05-20 at 09:28 -0700, Jesse Barnes wrote:
On Thu, 20 May 2010 04:27:07 +0300 Maxim Levitsky maximlevitsky@gmail.com wrote:
On Thu, 2010-05-20 at 04:13 +0300, Maxim Levitsky wrote:
On Wed, 2010-05-19 at 17:34 -0700, Jesse Barnes wrote: > On Fri, 9 Apr 2010 15:10:50 -0700 > Jesse Barnes jbarnes@virtuousgeek.org wrote: > > > This set of 3 patches makes it a little more likely we'll get panic > > output onto the screen even when X is running, assuming a KMS enabled > > stack anyway. > > > > It gets me from a blank or very sparsely populated black screen at > > panic time, to one including the full backtrace and panic output at > > panic time (tested with "echo c > /proc/sysrq-trigger" from an X > > session). > > > > It doesn't cover every case; for instance I think it'll fail when X has > > disabled the display, but those cases need to be handled with separate > > patches anyway (need to add atomic DPMS paths for instance). > > > > Anyway, please test these out and let me know if they work for you. > > Ping Linus & Dave again. Have you guys tried these? Really, it's cool. > Second that, just tested these patches, and these work perfectly. One more reason for me to dump nvidia driver for nouveau.
Unfortunately I spoke too soon.
After suspend to ram, system doesn't properly resume now.
My system is based on nvidia G86, I use latest nouveau drivers, and suspend with compiz running.
I also patched kernel not to do vt switch on suspend/resume:
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c index 062b7f6..b3ef08b 100644 --- a/drivers/gpu/drm/nouveau/nouveau_state.c +++ b/drivers/gpu/drm/nouveau/nouveau_state.c @@ -31,6 +31,7 @@ #include "drm_crtc_helper.h" #include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> +#include <linux/suspend.h>
#include "nouveau_drv.h" #include "nouveau_drm.h" @@ -771,6 +772,8 @@ int nouveau_load(struct drm_device *dev, unsigned long flags) int ret = nouveau_card_init(dev); if (ret) return ret;
pm_set_vt_switch(0); } return 0;Hm I don't see how my patches would have affected suspend/resume, since they just add "oops_in_progress" checks to a few places. Are you sure something else isn't breaking your resume path?
I am sure. I just reverted them, and everything works again. I refer to 3 patches in this thread.
In fact I might look a bit silly, but I applied these patches on top of linus master tree + nouveau master, and suspend to ram works just fine.
Maybe it shows up when kgdb+kdb isn't compiled in or so. Maybe it just triggered some bug in nouveau drivers...
(Note that I also enabled kgdb, and kdb, and breaking into kdb (SysRQ+g) doesn't switch console mode, just hangs till I press 'g'.
Ok so it sounds like these particular patches are innocent?
As for kdb, I think the latest tree is probably missing the graphics switch support on the driver side...
In what part? nouveau or kdb?
Screen does switch to text mode and displays the backtrace on 'panic' (Tested with sysrq+c). (If kdb is enabled, screen doesn't switch, but allowing kdb to continue via 'g' command eventually breaks into it.)
Best regards, Maxim Levitsky