Hi

I've tried installing FC4 and Kubuntu 5.10 and they both give me an identical issue: sound plays out of the internal speakers but if I connect a pair of headphones or external speakers to the headphone jack there is no audio output from that jack - sound continues to play through the internal speakers.

The laptop is a Intel Centrino based laptop and uses a Realtek High Definition Audio (detected on Linux as HDA Intel) onboard soundcard. I know its not a hardware problem because under Windows, plugging in anything into the headphone jack redirects the audio output and stops playback on the built-in speakers.

Has anyone faced this before or have any suggestions?

I've tried unmuting everything in KMix / Alsamixer but that doesn't help. I read elsewhere that its possible that the headphone jack is actually a line-out... however neither KMix nor Alsamixer give me an option to control line out.

Thanks

Kernel - 2.6.11-1.1369 (FC4)

/sbin/lspci output:
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller (rev 04)
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)
00:02.1 Display controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 04)
00:1b.0 Class 0403: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI Express Port 1 (rev 04)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #1 (rev 04)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #2 (rev 04)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #3 (rev 04)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB UHCI #4 (rev 04)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) USB2 EHCI Controller (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d4)
00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge (rev 04)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) IDE Controller (rev 04)
00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus Controller (rev 04)
05:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
05:04.0 Network controller: Intel Corporation PRO/Wireless 2200BG (rev 05)
05:06.0 CardBus bridge: Texas Instruments Texas Instruments PCIxx21/x515 Cardbus Controller
05:06.2 FireWire (IEEE 1394): Texas Instruments Texas Instruments OHCI Compliant IEEE 1394 Host Controller
05:06.3 Unknown mass storage controller: Texas Instruments Texas Instruments PCIxx21 Integrated FlashMedia Controller
05:06.4 Class 0805: Texas Instruments Texas Instruments PCI6411, PCI6421, PCI6611, PCI6621, PCI7411, PCI7421, PCI7611, PCI7621 Secure Digital (SD)

See if this discussion does help you:

http://forums.fedoraforum.org/showthread.php?t=62932

Pl. post your conclusions.

Thanks. The first time I installed FC4, I actually upgraded to 2.6.14 kernel but the the problem still exists. I believe the thread you pointed to said that sound wouldn't work at all - whereas in my case it does work, only not out of the headphone jack. Like the thread though, I do notice that in mixer/vol control I have very few options, not even a Master volume option is given. I will try and see if upgrading just to 2.6.13 helps.

OK, I managed to solve the problem by downloading and compiling alsa-driver 1.0.10.RC3

Hello

How did you even get it to install. I have not been able to install in any distro . pleas tell me how you got it to install