Hi Alexander,
On Sun, Jul 02, 2017 at 04:32:18AM +0300, Alexander Babayants wrote:
Hi,
HP Pavilion 15 keyboard controller sometimes (as far as I've found, at
least after keyboard (re-)connection and LED status change) emits 0xAA
scancode (BAT passed) and key-up events for LCtrl, LAlt, RCtrl, RAlt,
RShift. This, in turn, causes the keyboard to reconnect
(drivers/input/keyboard/atkbd.c, line 424) and to emit 0xAA scancode again,
which results in keyboard being stuck in endless loop of reconnecting.
While in this loop, keyboard is usable, but some keystrokes are being
occasionally dropped.
Is it necessary to handle BAT scancode in such particular way? Couldn't it
just be ignored?
We should not ignore BAT, as it normally indicates that the keyboard
lost its state and we need to re-initialize it (update LED state to be
in sync with the keyboard state, set up repeat rate, select proper set -
2 or 3, etc).
I would be interesting to see the command stream there. Can you try
booting with i8042.debug and reproducing the issue?
Thanks.
--
Dmitry
Hi Dmitry,
2017-07-02 23:25 GMT+03:00 Dmitry Torokhov [off-list ref]:
I would be interesting to see the command stream there. Can you try
booting with i8042.debug and reproducing the issue?
I think this is the part where the keyboard initialization happens:
[ 0.000000] Command line: initrd=\initramfs-linux.img
root=/dev/sda6 rw i8042.debug=1
[ 0.000000] Kernel command line: initrd=\initramfs-linux.img
root=/dev/sda6 rw i8042.debug=1
[ 6.001554] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M]
at 0x60,0x64 irq 1,12
[ 6.001574] i8042: [0] d1 -> i8042 (command)
[ 6.002098] i8042: [0] df -> i8042 (parameter)
[ 6.002157] i8042: [0] ff -> i8042 (command)
[ 6.002214] i8042: [0] aa <- i8042 (flush, kbd)
[ 6.003510] i8042: [0] 20 -> i8042 (command)
[ 6.003518] i8042: [0] 9d <- i8042 (return)
[ 6.003571] i8042: [0] 20 -> i8042 (command)
[ 6.003576] i8042: [0] 65 <- i8042 (return)
[ 6.003629] i8042: [0] 20 -> i8042 (command)
[ 6.003635] i8042: [0] 65 <- i8042 (return)
[ 6.003639] i8042: [0] 60 -> i8042 (command)
[ 6.003799] i8042: [0] 74 -> i8042 (parameter)
[ 6.003856] i8042: [0] 65 <- i8042 (flush, kbd)
[ 6.003914] i8042: [0] d3 -> i8042 (command)
[ 6.004851] i8042: [1] 5a -> i8042 (parameter)
[ 6.004962] i8042: [1] 5a <- i8042 (return)
[ 6.004982] i8042: [1] a7 -> i8042 (command)
[ 6.005192] i8042: [1] 20 -> i8042 (command)
[ 6.005198] i8042: [1] 74 <- i8042 (return)
[ 6.005200] i8042: [1] a8 -> i8042 (command)
[ 6.005358] i8042: [1] 20 -> i8042 (command)
[ 6.005364] i8042: [1] 54 <- i8042 (return)
[ 6.005367] i8042: [1] 60 -> i8042 (command)
[ 6.005526] i8042: [1] 74 -> i8042 (parameter)
[ 6.005688] i8042: [1] d3 -> i8042 (command)
[ 6.006468] i8042: [1] f0 -> i8042 (parameter)
[ 6.006579] i8042: [1] f0 <- i8042 (return)
[ 6.006582] i8042: [1] d3 -> i8042 (command)
[ 6.007465] i8042: [2] 56 -> i8042 (parameter)
[ 6.007576] i8042: [2] 56 <- i8042 (return)
[ 6.007588] i8042: [2] d3 -> i8042 (command)
[ 6.008628] i8042: [2] a4 -> i8042 (parameter)
[ 6.008739] i8042: [2] a4 <- i8042 (return)
[ 6.008764] i8042: [2] 60 -> i8042 (command)
[ 6.008924] i8042: [2] 56 -> i8042 (parameter)
[ 6.008940] i8042: [2] Interrupt 1, without any data
[ 6.009102] i8042: [2] 60 -> i8042 (command)
[ 6.009261] i8042: [2] 47 -> i8042 (parameter)
[ 6.009264] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 6.009350] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 6.010010] i8042: [2] b8 <- i8042 (interrupt, 0, 1)
[ 6.011180] i8042: [3] e0 <- i8042 (interrupt, 0, 1)
[ 6.013453] i8042: [3] 9d <- i8042 (interrupt, 0, 1)
[ 6.015734] i8042: [4] b6 <- i8042 (interrupt, 0, 1)
[ 6.016704] i8042: [4] e0 <- i8042 (interrupt, 0, 1)
[ 6.018599] i8042: [5] b8 <- i8042 (interrupt, 0, 1)
[ 6.044183] i8042: [13] f2 -> i8042 (kbd-data)
[ 6.045444] i8042: [13] fa <- i8042 (interrupt, 0, 1)
[ 6.046079] i8042: [13] ab <- i8042 (interrupt, 0, 1)
[ 6.046731] i8042: [13] 41 <- i8042 (interrupt, 0, 1)
[ 6.046745] i8042: [13] f5 -> i8042 (kbd-data)
[ 6.048040] i8042: [14] fa <- i8042 (interrupt, 0, 1)
[ 6.048056] i8042: [14] ed -> i8042 (kbd-data)
[ 6.049348] i8042: [14] fa <- i8042 (interrupt, 0, 1)
[ 6.049363] i8042: [14] 00 -> i8042 (kbd-data)
[ 6.050642] i8042: [14] fa <- i8042 (interrupt, 0, 1)
[ 6.050653] i8042: [14] f3 -> i8042 (kbd-data)
[ 6.051939] i8042: [15] fa <- i8042 (interrupt, 0, 1)
[ 6.051951] i8042: [15] 00 -> i8042 (kbd-data)
[ 6.053242] i8042: [15] fa <- i8042 (interrupt, 0, 1)
[ 6.053275] i8042: [15] f4 -> i8042 (kbd-data)
[ 6.054542] i8042: [16] fa <- i8042 (interrupt, 0, 1)
[ 6.054650] input: AT Translated Set 2 keyboard as
/devices/platform/i8042/serio0/input/input0
[ 6.054694] i8042: [16] d4 -> i8042 (command)
[ 6.054905] i8042: [16] f2 -> i8042 (parameter)
[ 6.057267] i8042: [16] fa <- i8042 (interrupt, 1, 12)
[ 6.058355] i8042: [17] 00 <- i8042 (interrupt, 1, 12)
[ 6.058370] i8042: [17] 60 -> i8042 (command)
[ 6.058530] i8042: [17] 45 -> i8042 (parameter)
[ 6.058688] i8042: [17] 60 -> i8042 (command)
[ 6.058848] i8042: [17] 47 -> i8042 (parameter)
And this is being spammed to dmesg approx. every second since keyboard
initialization:
[ 89.574138] i8042: [25070] ** <- i8042 (interrupt, 0, 1)
[ 89.574188] i8042: [25070] f2 -> i8042 (kbd-data)
[ 89.575455] i8042: [25070] ** <- i8042 (interrupt, 0, 1)
[ 89.576127] i8042: [25070] ** <- i8042 (interrupt, 0, 1)
[ 89.576756] i8042: [25071] ** <- i8042 (interrupt, 0, 1)
[ 89.577699] i8042: [25071] f5 -> i8042 (kbd-data)
[ 89.579023] i8042: [25071] ** <- i8042 (interrupt, 0, 1)
[ 89.579089] i8042: [25071] ed -> i8042 (kbd-data)
[ 89.580399] i8042: [25072] ** <- i8042 (interrupt, 0, 1)
[ 89.580542] i8042: [25072] 02 -> i8042 (kbd-data)
[ 89.581825] i8042: [25072] ** <- i8042 (interrupt, 0, 1)
[ 89.581886] i8042: [25072] f3 -> i8042 (kbd-data)
[ 89.583249] i8042: [25072] ** <- i8042 (interrupt, 0, 1)
[ 89.583309] i8042: [25072] 00 -> i8042 (kbd-data)
[ 89.584614] i8042: [25073] ** <- i8042 (interrupt, 0, 1)
[ 89.584655] i8042: [25073] f4 -> i8042 (kbd-data)
[ 89.585983] i8042: [25073] ** <- i8042 (interrupt, 0, 1)
[ 89.586685] i8042: [25073] ** <- i8042 (interrupt, 0, 1)
[ 89.588451] i8042: [25074] ** <- i8042 (interrupt, 0, 1)
[ 89.589608] i8042: [25074] ** <- i8042 (interrupt, 0, 1)
[ 89.591506] i8042: [25075] ** <- i8042 (interrupt, 0, 1)
[ 89.593479] i8042: [25076] ** <- i8042 (interrupt, 0, 1)
[ 89.595672] i8042: [25076] ** <- i8042 (interrupt, 0, 1)
[ 89.597691] i8042: [25077] ** <- i8042 (interrupt, 0, 1)
[ 91.141599] i8042: [25540] ** <- i8042 (interrupt, 0, 1)
[ 91.141630] i8042: [25540] f2 -> i8042 (kbd-data)
[ 91.142958] i8042: [25540] ** <- i8042 (interrupt, 0, 1)
[ 91.143580] i8042: [25541] ** <- i8042 (interrupt, 0, 1)
[ 91.144230] i8042: [25541] ** <- i8042 (interrupt, 0, 1)
[ 91.144251] i8042: [25541] f5 -> i8042 (kbd-data)
[ 91.145539] i8042: [25541] ** <- i8042 (interrupt, 0, 1)
[ 91.145555] i8042: [25541] ed -> i8042 (kbd-data)
[ 91.146850] i8042: [25542] ** <- i8042 (interrupt, 0, 1)
[ 91.146886] i8042: [25542] 02 -> i8042 (kbd-data)
[ 91.148144] i8042: [25542] ** <- i8042 (interrupt, 0, 1)
[ 91.148184] i8042: [25542] f3 -> i8042 (kbd-data)
[ 91.149460] i8042: [25542] ** <- i8042 (interrupt, 0, 1)
[ 91.149479] i8042: [25542] 00 -> i8042 (kbd-data)
[ 91.150805] i8042: [25543] ** <- i8042 (interrupt, 0, 1)
[ 91.150985] i8042: [25543] f4 -> i8042 (kbd-data)
[ 91.152234] i8042: [25543] ** <- i8042 (interrupt, 0, 1)
[ 91.153661] i8042: [25544] ** <- i8042 (interrupt, 0, 1)
[ 91.155557] i8042: [25544] ** <- i8042 (interrupt, 0, 1)
[ 91.157172] i8042: [25545] ** <- i8042 (interrupt, 0, 1)
[ 91.158928] i8042: [25545] ** <- i8042 (interrupt, 0, 1)
[ 91.160903] i8042: [25546] ** <- i8042 (interrupt, 0, 1)
[ 91.162180] i8042: [25546] ** <- i8042 (interrupt, 0, 1)
[ 91.163938] i8042: [25547] ** <- i8042 (interrupt, 0, 1)
If necessary, I could provide the full dmesg log, but it's quite large
(~300kb for 256 seconds since boot) and apparently it's not allowed to
attach files on the mailing list. Will it be convenient for you if I
upload it on Google Drive/Dropbox/smth.?
Regards,
Alexander Babayants.