[PATCH 2/4] xserver: limit the kernel subsystems we look for devices in

[Michael Thayer]

On 10/17/2011 03:39 PM, Jochen Friedrich wrote:
> Am Mon, 18 Jul 2011 schrieb Lennart Poettering:
>
>> Don't enumerate/monitor all devices of the system (since that can be
>> quite a few), but limit our search to devices from the "input"
>> subsystem, as well as the "tty" subsystem (to cover Wacom tablets).
>>
>> This should make X start up a bit faster and reduce the number of
>> unnecessary wake-ups of the X server.
>> ---
>> config/udev.c | 7 +++++++
>> 1 files changed, 7 insertions(+), 0 deletions(-)
>>
>> diff --git a/config/udev.c b/config/udev.c
>> index 5ac52a1..0763cc9 100644
>> --- a/config/udev.c
>> +++ b/config/udev.c
>> @@ -281,6 +281,9 @@ config_udev_init(void)
>> if (!udev_monitor)
>> return 0;
>>
>> + udev_monitor_filter_add_match_subsystem_devtype(udev_monitor,
>> "input", NULL);
>> + udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty",
>> NULL); /* For Wacom serial devices */
>> +
>> if (udev_monitor_enable_receiving(udev_monitor)) {
>> ErrorF("config/udev: failed to bind the udev monitor\n");
>> return 0;
>> @@ -289,6 +292,10 @@ config_udev_init(void)
>> enumerate = udev_enumerate_new(udev);
>> if (!enumerate)
>> return 0;
>> +
>> + udev_enumerate_add_match_subsystem(enumerate, "input");
>> + udev_enumerate_add_match_subsystem(enumerate, "tty");
>> +
>> udev_enumerate_scan_devices(enumerate);
>> devices = udev_enumerate_get_list_entry(enumerate);
>> udev_list_entry_foreach(device, devices) {
>
> Debian just switched to a version containing this patch in sid.
> This prevents autoloading vboxmouse driver as the corresponding device
> is in
> subsystem "misc". Adding matches for "misc" enables autoloading again.

As of VirtualBox 4.1.4 the Guest Additions use a kernel input driver for 
X.Org Server 1.6 and above so if you use that version (the changes 
should backport to older Additions if necessary) you should be up and 
running again.

Regards,

Michael
-- 
ORACLE Deutschland B.V. & Co. KG   Michael Thayer
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