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| Who | What | When |
|---|---|---|
| LazyGrizzly | i am currently unable to load uvcvideo
dmesg reports Latest git patches (needed if you report a bug to linux-media@vger.kernel.org): 6f0e5fd39143a59c22d60e7befc4f33f22aeed2f media: vb2: add a new warning about pending buffers 2e33dbb06da4078f94ed8e5fb596ddeca45a1099 media: vb2: add pr_fmt() macro ce4686702f8f56e14388ab452f0b5201b8277872 media: vb2: Fix a bug about unnecessary calls to queue cancel and free videobuf2_core: disagrees about version of symbol v4l_vb2q_enable_media_source videobuf2_core: Unknown symbol v4l_vb2q_enable_media_source (err -22) | [05:54] |
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| *** | prabhakarlad has left | [09:20] |
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| kbingham[m] | LazyGrizzly have you solved your module issue yet? Looks like it needs a clean rebuild or you're not building against the same build that is being run | [12:09] |
| LazyGrizzly | kbingham[m]: not yet. i pulled a fresh repo. without success. debian testing two with kernel 4.13 and 4.14 on another machine. kernels came from the repositories so that might cause problems | [12:14] |
| kbingham[m] | Are you testing this on the machine you are running? I.e. your development machine? | [12:16] |
| pinchartl | LazyGrizzly: it seems to be a build issue, not a uvc issue
(I read the code to see what v4l_vb2q_enable_media_source was and it made me cry, but that's a separate problem) | [12:17] |
| LazyGrizzly | i am running it on my dev machine but additionally on a separate pc that can be wiped at any time | [12:18] |
| kbingham | And are you building against the running kernel headers ? I.e. make -C /lib/modules/`uname -r`/build M=path/to/linux/drivers/media/usb/uvc/
(if your testing on your development machine that is ...) | [12:29] |
| LazyGrizzly | lets use my test machine as reference as it is in a way more clearer state. i set it up to check if it was a more general problem or if i just screwed my dev machine. debian testing kernel 4.14. For setting up the media build i basically followed this guide https://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers
developer's approach | [12:32] |
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| kbingham | kbingham has never used media_build ... perhaps he should try it out one day | [12:51] |
| LazyGrizzly | if there are better/more recommended ways to build the whole stuff i am all ears | [12:51] |
| kbingham | I've just rebuild and loaded uvcvideo here locally on my development machine.
The important part is that the call to the build system - must be the same as the kernel that you want to load the module into. And the kernel source version should be at least the same major release base. So - my ubuntu system is running a v4.14 kernel. | [12:52] |
| prabhakarlad | LazyGrizzly: I guess you are missing 'sudo make install'
above would make sure, your kernel and module are of same version! | [12:53] |
| LazyGrizzly | sudo make -C ../ install is executed and installs to /lib/modules/4.14.0-2-amd64/kernel like i would expect. | [12:55] |
| prabhakarlad | but the kernel version is a mismatch! if you arent building it from the same source version which you have currently booted | [12:56] |
| kbingham | LazyGrizzly: make -C /lib/modules/`uname -r`/build M=/home/<path to your tree>/linux/drivers/media/usb/uvc/
Then you can just do sudo rmmod uvcvideo (to remove whatever is loaded) and then sudo insmod <path to your tree>/linux/drivers/media/usb/uvc/uvcvideo.ko | [13:01] |
| LazyGrizzly | will try. one moment pls | [13:02] |
| make -C /lib/modules/`uname -r`/build M=/home/user/media_build/linux/drivers/media/usb/uvc compiles.
insmod says "insmod: ERROR: could not insert module linux/drivers/media/usb/uvc/uvcvideo.ko: Invalid parameters" will try with a v4.14 branch tomorrow. maybe that helps | [13:09] | |
| kbingham | Yes, the branch base should be the same or as close to the kernel you are running ... so if you want to test on a v4.14 kernel - make sure your patches are based on v4.14 | [13:13] |
| prabhakarlad | LazyGrizzly: https://www.pastiebin.com/5a4e27f927822 | [13:14] |
| LazyGrizzly | prabhakarlad: i will try that tomorrow morning. thank you. i have to leave in a few minutes.... | [13:16] |
| welp until tomorrow. thank you for your help | [13:22] | |
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| pos | Is it at all possible to query a v4l (bttv) chip/input about the actual input TVL or resolution?
xawtv seems to be able to do it, but i've got a few headless systems here : | [16:23] |
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| *** | awalls has left | [20:26] |
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