Re: rtl2832u+r820t dvb-t usb kernel crash

[Gianluca Gennari <gennarone@gmail.com>]

Il 06/05/2013 13:48, marco caminati ha scritto:
> My thanks to Mauro for his work on this device. Eager to try it, I built sources yesterday following directions on 
> 
> http://linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers
> 
> My environment is Tinycore Linux 4.7.5:
> 
> Linux box 3.0.21-tinycore #3021 SMP Sat Feb 18 11:54:11 EET 2012 i686 GNU/Linux
> 
> 
> The PC hangs (not even REISUB working) as soon as I plug my device in usb port.
> Killing udevd and loading one module a time, I found that the crash occurs exactly when I load 
> 
> dvb-usb-rtl28xxu.ko
> AND
> the device is plugged.
> I.e., to crash I just need to sudo modprobe dvb-usb-rtl28xxu and plug.
> 

Hi Marco,
I have the same device and the same issue on a 2.6.32 32 bit kernel.
However, I was able to run the driver successfully on 3.2.44 and 3.9.0
kernels (both 32 and 64 bit).
Also, I can run a similar device with a e4000 tuner with no problem even
on the old 2.6.32 kernel.

I just posted a few patches for the r820t tuner, can you try them and
check if they fix your problem?

Best regards,
Gianluca


> 
> My device is as from subject, with lsusb giving 0bda:2838. It looks like this:
> http://www.hamradioscience.com/wp-content/uploads/2012/10/R820T-560x420.jpg
> 
> I am quite sure it has a r820t tuner because sdr.osmocom.org logs told me so, and because I managed to make it work (as a DVB-T receiver) by patching some r820t code for an old kernel, see
> 
> http://www.spinics.net/lists/linux-media/msg57707.html.
> 
> Lars Buerding recently reported success on a newer kernel, so it might be a backport problem. However, I had similar results on a fresh Debian Wheezy yesterday.
> 
> I append
> 1) the crash log (used klogd spitting on a -o sync mounted device).
> 2) lsusb -v for the device
> 
> 
> Regards,
> Marco
> 
> 
> 
> 
> *********************************
> *********************************
> 
> 
> May� 6 12:56:50 box user.info kernel: usb 1-4: new high speed USB device number 4 using ehci_hcd
> May� 6 12:56:50 box user.err kernel: WARNING: You are using an experimental version of the media stack.
> May� 6 12:56:50 box user.err kernel: ��� As the driver is backported to an older kernel, it doesn't offer
> May� 6 12:56:50 box user.err kernel: ��� enough quality for its usage in production.
> May� 6 12:56:50 box user.err kernel: ��� Use it with care.
> May� 6 12:56:50 box user.err kernel: Latest git patches (needed if you report a bug to linux-media@vger.kernel.org):
> May� 6 12:56:50 box user.err kernel: ��� 02615ed5e1b2283db2495af3cf8f4ee172c77d80 [media] cx88: make core less verbose
> May� 6 12:56:50 box user.err kernel: ��� a3b60209e7dd4db05249a9fb27940bb6705cd186 [media] em28xx: fix oops at em28xx_dvb_bus_ctrl()
> May� 6 12:56:50 box user.err kernel: ��� 4494f0fdd825958d596d05a4bd577df94b149038 [media] s5c73m3: fix indentation of the help section in Kconfig
> May� 6 12:56:50 box user.err kernel: WARNING: You are using an experimental version of the media stack.
> May� 6 12:56:50 box user.err kernel: ��� As the driver is backported to an older kernel, it doesn't offer
> May� 6 12:56:50 box user.err kernel: ��� enough quality for its usage in production.
> May� 6 12:56:50 box user.err kernel: ��� Use it with care.
> May� 6 12:56:50 box user.err kernel: Latest git patches (needed if you report a bug to linux-media@vger.kernel.org):
> May� 6 12:56:50 box user.err kernel: ��� 02615ed5e1b2283db2495af3cf8f4ee172c77d80 [media] cx88: make core less verbose
> May� 6 12:56:50 box user.err kernel: ��� a3b60209e7dd4db05249a9fb27940bb6705cd186 [media] em28xx: fix oops at em28xx_dvb_bus_ctrl()
> May� 6 12:56:50 box user.err kernel: ��� 4494f0fdd825958d596d05a4bd577df94b149038 [media] s5c73m3: fix indentation of the help section in Kconfig
> May� 6 12:56:50 box user.info kernel: usb 1-4: dvb_usb_v2: found a 'Realtek RTL2832U reference design' in warm state
> May� 6 12:56:50 box user.info kernel: usbcore: registered new interface driver dvb_usb_rtl28xxu
> May� 6 12:56:50 box user.alert kernel: BUG: unable to handle kernel NULL pointer dereference at 00000028
> May� 6 12:56:50 box user.alert kernel: IP: [<f11e171d>] 0xf11e171d
> May� 6 12:56:50 box user.warn kernel: *pde = 00000000 
> May� 6 12:56:50 box user.emerg kernel: Oops: 0000 [#1] SMP 
> May� 6 12:56:50 box user.warn kernel: Modules linked in: dvb_usb_rtl28xxu dvb_usb_v2 rtl2830 dvb_core rc_core rt73usb rt2x00usb rt2x00lib mac80211 cfg80211 acpi_cpufreq cpufreq_userspace mperf cpufreq_stats cpufreq_powersave cpufreq_conservative squashfs scsi_wait_
> May� 6 12:56:50 box user.warn kernel: Pid: 52, comm: kworker/1:2 Tainted: P�������� C� 3.0.21-tinycore #3021 FUJITSU SIEMENS AMILO Li1705/AMILO Li1705
> May� 6 12:56:50 box user.warn kernel: EIP: 0060:[<f11e171d>] EFLAGS: 00010246 CPU: 1
> May� 6 12:56:50 box user.warn kernel: EAX: 00000000 EBX: ed07ff02 ECX: 00000000 EDX: ffffffff
> May� 6 12:56:50 box user.warn kernel: ESI: ed232038 EDI: 00000000 EBP: eee06a00 ESP: ed901f54
> May� 6 12:56:50 box user.warn kernel:� DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> May� 6 12:56:50 box user.emerg kernel: Process kworker/1:2 (pid: 52, ti=ed900000 task=ed839030 task.ti=ed900000)
> May� 6 12:56:50 box user.emerg kernel: Stack:
> May� 6 12:56:50 box user.warn kernel:� 00000000 ed232000 c05af00c eee03078 00000001 eee03030 243e1b2c 00000000
> May� 6 12:56:50 box user.warn kernel:� ed8f2d80 ed232038 eee026c0 eee06a00 c013b0be eee02700 00000000 f11e1597
> May� 6 12:56:50 box user.warn kernel:� eee06a05 ed8f2d80 eee026c0 ed8f2d90 ed839030 c013bc6f ed8f2d90 ee867f34
> May� 6 12:56:50 box user.emerg kernel: Call Trace:
> May� 6 12:56:50 box user.warn kernel:� [<c013b0be>] ? 0xc013b0be
> May� 6 12:56:50 box user.warn kernel:� [<f11e1597>] ? 0xf11e1597
> May� 6 12:56:50 box user.warn kernel:� [<c013bc6f>] ? 0xc013bc6f
> May� 6 12:56:50 box user.warn kernel:� [<c013bbc6>] ? 0xc013bbc6
> May� 6 12:56:50 box user.warn kernel:� [<c013e3a8>] ? 0xc013e3a8
> May� 6 12:56:50 box user.warn kernel:� [<c013e345>] ? 0xc013e345
> May� 6 12:56:50 box user.warn kernel:� [<c0417936>] ? 0xc0417936
> May� 6 12:56:50 box user.emerg kernel: Code: 00 00 8b 44 24 14 e8 54 fc ff ff 8b 43 c8 8b 50 70 83 c4 10 85 d2 74 10 8b 44 24 04 ff d2 85 c0 89 c7 0f 88 bd 06 00 00 8b 43 c8 
> May� 6 12:56:50 box user.emerg kernel: 3> 78 28 00 74 67 8b 53 cc b9 30 00 00 00 8d 83 a8 01 00 00 8d 
> May� 6 12:56:50 box user.emerg kernel: EIP: [<f11e171d>]� SS:ESP 0068:ed901f54
> May� 6 12:56:50 box user.emerg kernel: CR2: 0000000000000028
> May� 6 12:56:50 box user.warn kernel: ---[ end trace 604313c755d73a7e ]---
> May� 6 12:56:50 box user.alert kernel: BUG: unable to handle kernel paging request at fffffffc
> May� 6 12:56:50 box user.alert kernel: IP: [<c013e501>] 0xc013e501
> May� 6 12:56:50 box user.warn kernel: *pde = 005b9067 *pte = 00000000 
> May� 6 12:56:50 box user.emerg kernel: Oops: 0000 [#2] SMP 
> May� 6 12:56:50 box user.warn kernel: Modules linked in: dvb_usb_rtl28xxu dvb_usb_v2 rtl2830 dvb_core rc_core rt73usb rt2x00usb rt2x00lib mac80211 cfg80211 acpi_cpufreq cpufreq_userspace mperf cpufreq_stats cpufreq_powersave cpufreq_conservative squashfs scsi_wait_
> May� 6 12:56:50 box user.warn kernel: Pid: 52, comm: kworker/1:2 Tainted: P����� D� C� 3.0.21-tinycore #3021 FUJITSU SIEMENS AMILO Li1705/AMILO Li1705
> May� 6 12:56:50 box user.warn kernel: EIP: 0060:[<c013e501>] EFLAGS: 00010002 CPU: 1
> May� 6 12:56:50 box user.warn kernel: EAX: 00000000 EBX: eee05700 ECX: 00000001 EDX: 00000001
> May� 6 12:56:50 box user.warn kernel: ESI: 00000001 EDI: ed839030 EBP: ed839030 ESP: ed901dac
> May� 6 12:56:50 box user.warn kernel:� DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
> May� 6 12:56:50 box user.emerg kernel: Process kworker/1:2 (pid: 52, ti=ed900000 task=ed839030 task.ti=ed900000)
> May� 6 12:56:50 box user.emerg kernel: Stack:
> May� 6 12:56:50 box user.warn kernel:� c013bf2a eee05700 00000000 ed839030 c0415549 ee824980 c01c7389 00000001
> May� 6 12:56:50 box user.warn kernel:� c05b1700 ed8391c8 c05b1700 00000034 ee844650 ee844640 00000034 ed83858c
> May� 6 12:56:50 box user.warn kernel:� ed838584 ed83b040 00000002 ee803a40 00000246 c015fd31 ed839030 ed839030
> May� 6 12:56:50 box user.emerg kernel: Call Trace:
> May� 6 12:56:50 box user.warn kernel:� [<c013bf2a>] ? 0xc013bf2a
> May� 6 12:56:50 box user.warn kernel:� [<c0415549>] ? 0xc0415549
> May� 6 12:56:50 box user.warn kernel:� [<c01c7389>] ? 0xc01c7389
> May� 6 12:56:50 box user.warn kernel:� [<c015fd31>] ? 0xc015fd31
> May� 6 12:56:50 box user.warn kernel:� [<c012e01b>] ? 0xc012e01b
> May� 6 12:56:50 box user.warn kernel:� [<c04158f7>] ? 0xc04158f7
> May� 6 12:56:50 box user.warn kernel:� [<c012f3d5>] ? 0xc012f3d5
> May� 6 12:56:50 box user.warn kernel:� [<c014dd19>] ? 0xc014dd19
> May� 6 12:56:50 box user.warn kernel:� [<c0104d6b>] ? 0xc0104d6b
> May� 6 12:56:50 box user.warn kernel:� [<c0411f49>] ? 0xc0411f49
> May� 6 12:56:50 box user.warn kernel:� [<c041209c>] ? 0xc041209c
> May� 6 12:56:50 box user.warn kernel:� [<c011ba09>] ? 0xc011ba09
> May� 6 12:56:50 box user.warn kernel:� [<c0410001>] ? 0xc0410001
> May� 6 12:56:50 box user.warn kernel:� [<c011b8c8>] ? 0xc011b8c8
> May� 6 12:56:50 box user.warn kernel:� [<c041715a>] ? 0xc041715a
> May� 6 12:56:50 box user.warn kernel:� [<c011b8c8>] ? 0xc011b8c8
> May� 6 12:56:50 box user.warn kernel:� [<f11e171d>] ? 0xf11e171d
> May� 6 12:56:50 box user.warn kernel:� [<c013b0be>] ? 0xc013b0be
> May� 6 12:56:50 box user.warn kernel:� [<f11e1597>] ? 0xf11e1597
> May� 6 12:56:50 box user.warn kernel:� [<c013bc6f>] ? 0xc013bc6f
> May� 6 12:56:50 box user.warn kernel:� [<c013bbc6>] ? 0xc013bbc6
> May� 6 12:56:50 box user.warn kernel:� [<c013e3a8>] ? 0xc013e3a8
> May� 6 12:56:50 box user.warn kernel:� [<c013e345>] ? 0xc013e345
> May� 6 12:56:50 box user.warn kernel:� [<c0417936>] ? 0xc0417936
> May� 6 12:56:50 box user.emerg kernel: Code: 89 f0 83 e0 1f c1 ee 05 8d 14 85 78 c1 41 c0 89 d8 c1 e6 02 29 f2 e8 0e ab fe ff 81 4b 0c 00 00 00 04 5b 5e c3 8b 80 6c 01 00 00 <8b> 40 fc c3 31 c0 c3 57 ba c6 ee 47 c0 56 53 64 8b 35 c4 d4 5a 
> May� 6 12:56:50 box user.emerg kernel: EIP: [<c013e501>]� SS:ESP 0068:ed901dac
> May� 6 12:56:50 box user.emerg kernel: CR2: 00000000fffffffc
> May� 6 12:56:50 box user.warn kernel: ---[ end trace 604313c755d73a7f ]---
> May� 6 12:56:50 box user.alert kernel: Fixing recursive fault but reboot is needed!
> 
> 
> 
> *********************************
> *********************************
> 
> 
> 
> Bus 001 Device 006: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
> Device Descriptor:
> � bLength��������������� 18
> � bDescriptorType�������� 1
> � bcdUSB�������������� 2.00
> � bDeviceClass����������� 0 (Defined at Interface level)
> � bDeviceSubClass�������� 0 
> � bDeviceProtocol�������� 0 
> � bMaxPacketSize0������� 64
> � idVendor���������� 0x0bda Realtek Semiconductor Corp.
> � idProduct��������� 0x2838 RTL2838 DVB-T
> � bcdDevice����������� 1.00
> � iManufacturer���������� 1 Realtek
> � iProduct��������������� 2 RTL2838UHIDIR
> � iSerial���������������� 3 00000013
> � bNumConfigurations����� 1
> � Configuration Descriptor:
> ��� bLength���������������� 9
> ��� bDescriptorType�������� 2
> ��� wTotalLength���������� 34
> ��� bNumInterfaces��������� 2
> ��� bConfigurationValue���� 1
> ��� iConfiguration��������� 4 USB2.0-Bulk&Iso
> ��� bmAttributes�������� 0x80
> ����� (Bus Powered)
> ��� MaxPower������������� 500mA
> ��� Interface Descriptor:
> ����� bLength���������������� 9
> ����� bDescriptorType�������� 4
> ����� bInterfaceNumber������� 0
> ����� bAlternateSetting������ 0
> ����� bNumEndpoints���������� 1
> ����� bInterfaceClass������ 255 Vendor Specific Class
> ����� bInterfaceSubClass��� 255 Vendor Specific Subclass
> ����� bInterfaceProtocol��� 255 Vendor Specific Protocol
> ����� iInterface������������� 5 Bulk-In, Interface
> ����� Endpoint Descriptor:
> ������� bLength���������������� 7
> ������� bDescriptorType�������� 5
> ������� bEndpointAddress���� 0x81� EP 1 IN
> ������� bmAttributes����������� 2
> ��������� Transfer Type����������� Bulk
> ��������� Synch Type�������������� None
> ��������� Usage Type�������������� Data
> ������� wMaxPacketSize���� 0x0200� 1x 512 bytes
> ������� bInterval�������������� 0
> ��� Interface Descriptor:
> ����� bLength���������������� 9
> ����� bDescriptorType�������� 4
> ����� bInterfaceNumber������� 1
> ����� bAlternateSetting������ 0
> ����� bNumEndpoints���������� 0
> ����� bInterfaceClass������ 255 Vendor Specific Class
> ����� bInterfaceSubClass��� 255 Vendor Specific Subclass
> ����� bInterfaceProtocol��� 255 Vendor Specific Protocol
> ����� iInterface������������� 5 Bulk-In, Interface
> Device Qualifier (for other device speed):
> � bLength��������������� 10
> � bDescriptorType�������� 6
> � bcdUSB�������������� 2.00
> � bDeviceClass����������� 0 (Defined at Interface level)
> � bDeviceSubClass�������� 0 
> � bDeviceProtocol�������� 0 
> � bMaxPacketSize0������� 64
> � bNumConfigurations����� 2
> Device Status:���� 0x0000
> � (Bus Powered)
> --
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