https://bugzilla.kernel.org/show_bug.cgi?id=40672
Igor Murzov <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #67892|0 |1 is obsolete| | Attachment #67902|0 |1 is obsolete| | Attachment #72215|0 |1 is obsolete| | Attachment #72216|0 |1 is obsolete| | --- Comment #25 from Igor Murzov <[email protected]> 2012-02-24 00:12:28 --- Created an attachment (id=72472) --> (https://bugzilla.kernel.org/attachment.cgi?id=72472) dmesg output when display flickering was observed Booting kernel with acpi.debug_level=0xF acpi.debug_layer=0x10C10006 revealed that on the early stage LCD_ receives spurious notifies like this: [ 1.220201] evmisc-0120 [4294967294] ev_queue_notify_reques: Dispatching Notify on [LCD_] Node ffff8800af04e5c8 Value 0x87 (**Device Specific**) [ 1.220431] evmisc-0196 [4294967294] ev_queue_notify_reques: No notify handler for Notify (LCD_, 87) node ffff8800af04e5c8 [ 1.220666] evmisc-0120 [4294967294] ev_queue_notify_reques: Dispatching Notify on [LCD_] Node ffff8800af04f050 Value 0x87 (**Device Specific**) [ 1.220891] evmisc-0196 [4294967294] ev_queue_notify_reques: No notify handler for Notify (LCD_, 87) node ffff8800af04f050 [ 1.221136] evmisc-0120 [4294967294] ev_queue_notify_reques: Dispatching Notify on [VPC0] Node ffff8800af052140 Value 0x80 (**Device Specific**) [ 1.221361] evmisc-0196 [4294967294] ev_queue_notify_reques: No notify handler for Notify (VPC0, 80) node ffff8800af052140 I'm pretty sure, that those notifies cause display flickering and crashes. What is also interesting in the attached dmesg log is that *one* single Fn+Up or Fn+Down keypress produces *two* notifies, thus skipping some brightness levels: [ 1917.142236] evmisc-0120 [4294967289] ev_queue_notify_reques: Dispatching Notify on [LCD_] Node ffff8800af04e5c8 Value 0x86 (**Device Specific**) [ 1917.142288] evmisc-0120 [4294967289] ev_queue_notify_reques: Dispatching Notify on [LCD_] Node ffff8800af04f050 Value 0x86 (**Device Specific**) [ 1917.142330] evmisc-0120 [4294967289] ev_queue_notify_reques: Dispatching Notify on [VPC0] Node ffff8800af052140 Value 0x80 (**Device Specific**) [ 1917.142351] evmisc-0196 [4294967289] ev_queue_notify_reques: No notify handler for Notify (VPC0, 80) node ffff8800af052140 [ 1917.147153] utils-0286 [4294967282] evaluate_integer : Return value [40] [ 1917.156349] utils-0286 [4294967282] evaluate_integer : Return value [50] [ 1917.161988] utils-0286 [4294967282] evaluate_integer : Return value [50] [ 1917.171846] utils-0286 [4294967282] evaluate_integer : Return value [60] I had to add "blacklist video" to my /etc/modprobe.d/blacklist.conf to prevent crashes and flickering, but I'm not able to change display brightness now. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. You are watching the assignee of the bug. ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
