On Thu, 2007-02-22 at 14:53 +0200, S.Çağlar Onur wrote: > Hi; > > 22 Şub 2007 Per tarihinde, Antonino A. Daplas şunları yazmıştı: > > On Thu, 2007-02-15 at 13:00 +0200, S.Çağlar Onur wrote: > > > 15 Şub 2007 Per tarihinde, Andrew Morton şunları yazmıştı: > > > > On Thu, 15 Feb 2007 11:40:32 +0100 Pavel Machek <[EMAIL PROTECTED]> > > > > wrote: > > > > > Contact fbcon people... > > > > > > > > There aren't any, basically. Since Tony disappeared James has been > > > > helping out but doesn't have a lot of time. So we're pretty much on > > > > our own with problems in this area. > > > > > > I already sent same mail to > > > linux-fbdev-devel mailing lists at sf.net with hope :) > > > > > > Cheers > > > > Interesting... It does look like this was triggered by calling > > do_blank_screen() without taking the console semaphore, but > > console_callback() should have taken that. > > > > Second point is that vesafb does not have any blanking functionality, > > thus it should not trigger fbcon_event_notify(). My guess is you are > > using an out-of-tree vesafb? > > As i wrote we are using vesafb-tng [http://dev.gentoo.org/~spock/projects/] > for a long time but this hits me only with 2.6.20 and only after > suspend2disk, so im adding Michał Januszewski to CC if this is vesafb-tng > related :). >
Ah, and you have fb_splash too. That's why the tracing was not what I expected it to be. Try using video=vesafb:noblank to disable hardware blanking and find out if you can still reproduce the oops. > > BUG: at drivers/char/vt.c:3332 do_blank_screen() > > [<c02881f7>] do_blank_screen+0x4e/0x218 > > [<c02977fa>] fbcon_event_notify+0x8f1/0xa1e > > [<c027b2b0>] extract_buf+0xac/0xe1 > > [<c0102002>] __switch_to+0xeb/0x15d > > [<c034bbe5>] __sched_text_start+0x865/0x929 > > [<c029a50d>] bit_cursor+0x4c8/0x50b > > [<c034bd67>] wait_for_completion+0x79/0xaf > > [<c011cbe2>] default_wake_function+0x0/0xc > > [<c034ece2>] notifier_call_chain+0x19/0x32 > > [<c012d1c6>] blocking_notifier_call_chain+0x23/0x33 > > [<c028db54>] fb_blank+0x4a/0x53 > > [<c0299028>] fbcon_blank+0xf4/0x1e3 > > [<c0294f33>] fbcon_cursor+0x21c/0x250 > > [<c029a045>] bit_cursor+0x0/0x50b > > [<c0129e90>] lock_timer_base+0x15/0x2f > > [<c0129eee>] try_to_del_timer_sync+0x44/0x4a > > [<c0298f34>] fbcon_blank+0x0/0x1e3 > > [<c028835a>] do_blank_screen+0x1b1/0x218 > > [<c028abdd>] console_callback+0xaf/0xbf > > [<c012fa59>] run_workqueue+0x85/0x135 > > [<c028ab2e>] console_callback+0x0/0xbf > > [<c01302f0>] worker_thread+0x10a/0x136 > > [<c011cbe2>] default_wake_function+0x0/0xc > > [<c01301e6>] worker_thread+0x0/0x136 > > [<c0132982>] kthread+0xb2/0xdc > > [<c01328d0>] kthread+0x0/0xdc > > [<c0103a8f>] kernel_thread_helper+0x7/0x10 > > > > As for the last tracing, it looks to be valid bug to me. > > complete_change_console() should be called with the console sem > > taken. I'll look into this. > > If testing needed just ask please :) After grepping for change_console, all callers of change_console and complete_change_console are acquiring the console semaphore, so I really don't know what's going on here... Since you are using a non-vanilla kernel, can you just do a grep change_console of the kernel source and see if you can find a caller that missed doing an acquire_console_sem(). > > > BUG: at drivers/char/vt.c:3486 set_palette() > > [<c0287538>] set_palette+0x41/0x59 > > [<c028886f>] redraw_screen+0x110/0x17e > > [<c0282394>] complete_change_console+0x2a/0xba > > [<c028ab73>] console_callback+0x45/0xbf > > [<c012fa59>] run_workqueue+0x85/0x135 > > [<c028ab2e>] console_callback+0x0/0xbf > > [<c01302f0>] worker_thread+0x10a/0x136 > > [<c011cbe2>] default_wake_function+0x0/0xc > > [<c01301e6>] worker_thread+0x0/0x136 > > [<c0132982>] kthread+0xb2/0xdc > > [<c01328d0>] kthread+0x0/0xdc > > [<c0103a8f>] kernel_thread_helper+0x7/0x10 > > > > Tony > > Cheers Tony - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
