[yparitcher]

Originally Posted by NiLuJe

Sidebar: is that the right strace binary?

It doesn't appear to be decoding the MXCFB_SEND_UPDATES ioctl properly (that's supposed to be the _IOC(_IOC_WRITE, 0x46, 0x2e, ...) stuff), which is weird, since I could have sworn someone used it to send me nightmode dumps at one point...
(Might have been from a Zelda, though).

Remind me to do a fresh build to double-check .

i was using the system strace by mistake

[root@kindle tc]# ./strace -fittv -e trace=ioctl -p $(pidof awesome)
./strace: Process 3704 attached with 9 threads
[pid  3704] 17:47:18.713611 [76937bdc] ioctl(19, FBIOGET_VSCREENINFO, 0x7e90e5f8) = 0
[pid  3704] 17:47:18.716647 [76937bdc] ioctl(19, FBIOPUT_VSCREENINFO, 0x7e90e5f8) = 0
./strace: Process 25260 attached
[pid 25260] 17:47:18.782768 [76adc228] --- SIGILL {si_signo=SIGILL, si_code=ILL_ILLOPC, si_addr=0x76adc228} ---
[pid 25260] 17:47:18.835638 [????????] +++ exited with 0 +++
[pid  3704] 17:47:18.836463 [768d03cc] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25260, si_uid=0, si_status=0, si_utime=1, si_stime=2} ---
./strace: Process 25261 attached
[pid 25261] 17:47:18.900744 [????????] +++ exited with 0 +++
[pid  3704] 17:47:18.901752 [768d03cc] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=25261, si_uid=0, si_status=0, si_utime=1, si_stime=5} ---
[pid  4910] 17:47:18.937798 [76937bdc] ioctl(19, MXCFB_SEND_UPDATE, {update_region={top=0, left=0, width=600, height=800}, waveform_mode=WAVEFORM_MODE_AUTO, update_mode=UPDATE_MODE_PARTIAL, update_marker=331, temp=TEMP_USE_AMBIENT, flags=0, dither_mode=EPDC_FLAG_USE_DITHERING_PASSTHROUGH, quant_bit=0, alt_buffer_data={phys_addr=0, width=0, height=0, alt_update_region={top=0, left=0, width=0, height=0}}, hist_bw_waveform_mode=WAVEFORM_MODE_DU, hist_gray_waveform_mode=WAVEFORM_MODE_GC16}, 0x7608fc7c) = 0
[pid  4910] 17:47:19.168755 [76937bdc] ioctl(19, MXCFB_SEND_UPDATE, {update_region={top=91, left=0, width=600, height=709}, waveform_mode=WAVEFORM_MODE_AUTO, update_mode=UPDATE_MODE_PARTIAL, update_marker=332, temp=TEMP_USE_AMBIENT, flags=0, dither_mode=EPDC_FLAG_USE_DITHERING_PASSTHROUGH, quant_bit=0, alt_buffer_data={phys_addr=0, width=0, height=0, alt_update_region={top=0, left=0, width=0, height=0}}, hist_bw_waveform_mode=WAVEFORM_MODE_DU, hist_gray_waveform_mode=WAVEFORM_MODE_GC16}, 0x7608fc7c) = 0
[pid  4910] 17:47:19.172369 [76937bdc] ioctl(19, MXCFB_SEND_UPDATE, {update_region={top=0, left=0, width=600, height=32}, waveform_mode=WAVEFORM_MODE_AUTO, update_mode=UPDATE_MODE_PARTIAL, update_marker=333, temp=TEMP_USE_AMBIENT, flags=0, dither_mode=EPDC_FLAG_USE_DITHERING_PASSTHROUGH, quant_bit=0, alt_buffer_data={phys_addr=0, width=0, height=0, alt_update_region={top=0, left=0, width=0, height=0}}, hist_bw_waveform_mode=WAVEFORM_MODE_DU, hist_gray_waveform_mode=WAVEFORM_MODE_GC16}, 0x7608fc7c) = 0
[pid  4910] 17:47:19.181464 [76937bdc] ioctl(19, MXCFB_SEND_UPDATE, {update_region={top=32, left=0, width=600, height=59}, waveform_mode=WAVEFORM_MODE_AUTO, update_mode=UPDATE_MODE_PARTIAL, update_marker=334, temp=TEMP_USE_AMBIENT, flags=0, dither_mode=EPDC_FLAG_USE_DITHERING_PASSTHROUGH, quant_bit=0, alt_buffer_data={phys_addr=0, width=0, height=0, alt_update_region={top=0, left=0, width=0, height=0}}, hist_bw_waveform_mode=WAVEFORM_MODE_DU, hist_gray_waveform_mode=WAVEFORM_MODE_GC16}, 0x7608fc7c) = 0
./strace: Process 3704 detached
./strace: Process 4888 detached
./strace: Process 4889 detached
./strace: Process 4907 detached
./strace: Process 4908 detached
./strace: Process 4910 detached
./strace: Process 4911 detached
./strace: Process 4912 detached
./strace: Process 15780 detached

vs

[root@kindle tc]# ./strace -fittv -e trace=ioctl ./fbdepth -qH toggle
17:47:56.314454 [76f17bdc] ioctl(3, FBIOGET_VSCREENINFO, 0x23090) = 0
17:47:56.317420 [76f17bdc] ioctl(3, FBIOGET_FSCREENINFO, 0x23138) = 0
17:47:56.318948 [76f17bdc] ioctl(3, FBIOPUT_VSCREENINFO, 0x23090) = 0
17:47:56.320730 [76f17bdc] ioctl(3, FBIOGET_VSCREENINFO, 0x23090) = 0
17:47:56.322101 [76f17bdc] ioctl(3, FBIOGET_FSCREENINFO, 0x23138) = 0
17:47:56.324760 [????????] +++ exited with 0 +++

fbgrab does not show a difference but with eips -i the grayscale: field is 1 with NM off and 2 with NM on, no differece if changed by lipc or fbdepth