https://bugs.freedesktop.org/show_bug.cgi?id=49943
Bug #: 49943 Summary: radeon/drm: Hotplug udev events stop working Classification: Unclassified Product: DRI Version: XOrg CVS Platform: All OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: h.judt@gmx.at
Making use of udev events, I'd like to launch a script when a monitor gets connected or disconnected. However, an event is only fired once and then never again.
Kernel: linux-3.4.0-rc7
lspci: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cayman PRO [Radeon HD 6950] (prog-if 00 [VGA controller]) Subsystem: Advanced Micro Devices [AMD] nee ATI Device 0b00 Flags: bus master, fast devsel, latency 0, IRQ 54 Memory at c0000000 (64-bit, prefetchable) [size=256M] Memory at fe620000 (64-bit, non-prefetchable) [size=128K] I/O ports at e000 [size=256] Expansion ROM at fe600000 [disabled] [size=128K] Capabilities: [50] Power Management version 3 Capabilities: [58] Express Legacy Endpoint, MSI 00 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?> Capabilities: [150] Advanced Error Reporting Kernel driver in use: radeon
xrandr --verbose: HDMI-0 connected (normal left inverted right x axis y axis) Identifier: 0x58 Timestamp: 21810 Subpixel: horizontal rgb Clones: CRTCs: 0 1 2 3 4 5 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff002203010be9030000 00110103804627780b1990a755469824 10494b3fcf00818081cf81c061c04bc0 4bcf453c61cf011d007251d01e206e28 5500c48e2100001e011d8018711c1620 582c2500c48e2100009e000000fc004d 737461722044656d6f0a2020000000fd 0016500e5b10000a202020202020014b 02031df24a0102038405101293141f23 0907078301000065030c0010008c0ad0 8a20e02d10103e9600138e2100001801 1d00bc52d01e20b8285540c48e210000 1e011d80d0721c1620102c2580c48e21 00009e8c0ad08a20e02d10103e9600c4 8e210000188c0ad090204031200c4055 00c48e2100001800000000000000002b underscan vborder: 0 (0x00000000) range: (0,128) underscan hborder: 0 (0x00000000) range: (0,128) underscan: off supported: off on auto coherent: 1 (0x00000001) range: (0,1) ----- [modes cut off here] -----
ls -la /sys/class/drm/card0-HDMI-A-1/ insgesamt 0 drwxr-xr-x 3 root root 0 15. Mai 2012 . drwxr-xr-x 8 root root 0 15. Mai 2012 .. lrwxrwxrwx 1 root root 0 15. Mai 10:12 device -> ../../card0 -r--r--r-- 1 root root 4096 15. Mai 10:12 dpms -r--r--r-- 1 root root 0 15. Mai 10:12 edid -r--r--r-- 1 root root 4096 15. Mai 10:12 enabled -r--r--r-- 1 root root 4096 15. Mai 10:12 modes drwxr-xr-x 2 root root 0 15. Mai 10:12 power -r--r--r-- 1 root root 4096 15. Mai 09:14 status lrwxrwxrwx 1 root root 0 15. Mai 2012 subsystem -> ../../../../../../../class/drm -rw-r--r-- 1 root root 4096 15. Mai 2012 uevent
Note the modification date of status and the other files. That of status did not change at all since boot, and the mdates of the others did change once apparently.
I can poll "status" and see the changes when executing xrandr, but there will be no more events, and the modification dates do not change anymore.