[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.13.0-38.43

---
linux (4.13.0-38.43) artful; urgency=medium

  * linux: 4.13.0-38.43 -proposed tracker (LP: #1755762)

  * Servers going OOM after updating kernel from 4.10 to 4.13 (LP: #1748408)
- i40e: Fix memory leak related filter programming status
- i40e: Add programming descriptors to cleaned_count

  * [SRU] Lenovo E41 Mic mute hotkey is not responding (LP: #1753347)
- platform/x86: ideapad-laptop: Increase timeout to wait for EC answer

  * fails to dump with latest kpti fixes (LP: #1750021)
- kdump: write correct address of mem_section into vmcoreinfo

  * headset mic can't be detected on two Dell machines (LP: #1748807)
- ALSA: hda/realtek - Support headset mode for ALC215/ALC285/ALC289
- ALSA: hda - Fix headset mic detection problem for two Dell machines
- ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines

  * CIFS SMB2/SMB3 does not work for domain based DFS (LP: #1747572)
- CIFS: make IPC a regular tcon
- CIFS: use tcon_ipc instead of use_ipc parameter of SMB2_ioctl
- CIFS: dump IPC tcon in debug proc file

  * i2c-thunderx: erroneous error message "unhandled state: 0" (LP: #1754076)
- i2c: octeon: Prevent error message on bus error

  * hisi_sas: Add disk LED support (LP: #1752695)
- scsi: hisi_sas: directly attached disk LED feature for v2 hw

  * EDAC, sb_edac: Backport 1 patch to Ubuntu 17.10 (Fix missing DIMM sysfs
entries with KNL SNC2/SNC4 mode) (LP: #1743856)
- EDAC, sb_edac: Fix missing DIMM sysfs entries with KNL SNC2/SNC4 mode

  * [regression] Colour banding and artefacts appear system-wide on an Asus
Zenbook UX303LA with Intel HD 4400 graphics (LP: #1749420)
- drm/edid: Add 6 bpc quirk for CPT panel in Asus UX303LA

  * DVB Card with SAA7146 chipset not working (LP: #1742316)
- vmalloc: fix __GFP_HIGHMEM usage for vmalloc_32 on 32b systems

  * [Asus UX360UA] battery status in unity-panel is not changing when battery is
being charged (LP: #1661876) // AC adapter status not detected on Asus
ZenBook UX410UAK (LP: #1745032)
- ACPI / battery: Add quirk for Asus UX360UA and UX410UAK

  * ASUS UX305LA - Battery state not detected correctly (LP: #1482390)
- ACPI / battery: Add quirk for Asus GL502VSK and UX305LA

  * support thunderx2 vendor pmu events (LP: #1747523)
- perf pmu: Extract function to get JSON alias map
- perf pmu: Pass pmu as a parameter to get_cpuid_str()
- perf tools arm64: Add support for get_cpuid_str function.
- perf pmu: Add helper function is_pmu_core to detect PMU CORE devices
- perf vendor events arm64: Add ThunderX2 implementation defined pmu core
  events
- perf pmu: Add check for valid cpuid in perf_pmu__find_map()

  * lpfc.ko module doesn't work (LP: #1746970)
- scsi: lpfc: Fix loop mode target discovery

  * Ubuntu 17.10 crashes on vmalloc.c (LP: #1739498)
- powerpc/mm/book3s64: Make KERN_IO_START a variable
- powerpc/mm/slb: Move comment next to the code it's referring to
- powerpc/mm/hash64: Make vmalloc 56T on hash

  * ethtool -p fails to light NIC LED on HiSilicon D05 systems (LP: #1748567)
- net: hns: add ACPI mode support for ethtool -p

  * CVE-2017-17807
- KEYS: add missing permission check for request_key() destination

  * [Artful SRU] Fix capsule update regression (LP: #1746019)
- efi/capsule-loader: Reinstate virtual capsule mapping

  * [Artful/Bionic] [Config] enable EDAC_GHES for ARM64 (LP: #1747746)
- Ubuntu: [Config] enable EDAC_GHES for ARM64

  * linux-tools: perf incorrectly linking libbfd (LP: #1748922)
- SAUCE: tools -- add ability to disable libbfd
- [Packaging] correct disablement of libbfd

  * Cherry pick c96f5471ce7d for delayacct fix (LP: #1747769)
- delayacct: Account blkio completion on the correct task

  * Error in CPU frequency reporting when nominal and min pstates are same
(cpufreq) (LP: #1746174)
- cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin

  * retpoline abi files are empty on i386 (LP: #1751021)
- [Packaging] retpoline-extract -- instantiate retpoline files for i386
- [Packaging] final-checks -- sanity checking ABI contents
- [Packaging] final-checks -- check for empty retpoline files

  * [P9,Power NV][WSP][Ubuntu 1804] : "Kernel access of bad area " when grouping
different pmu events using perf fuzzer . (perf:) (LP: #1746225)
- powerpc/perf: Fix oops when grouping different pmu events

  * bnx2x_attn_int_deasserted3:4323 MC assert! (LP: #1715519) //
CVE-2018-126
- net: create skb_gso_validate_mac_len()
- bnx2x: disable GSO where gso_size is too big for hardware

  * Ubuntu16.04.03: ISAv3 initialize MMU registers before setting partition
table (LP: #1736145)
- powerpc/64s: Initialize ISAv3 MMU registers before setting partition table

  * powerpc/powernv: Flush console before platform error reboot (LP: #1735159)
- 

[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Kernel 4.13.0-38-generic #43-Ubuntu SMP Wed Mar 14 15:23:42 UTC 2018
i686 i686 i686 GNU/Linux

from artful-proposed is working.


** Tags removed: verification-needed-artful
** Tags added: verification-done-artful

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Stefan Bader]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
artful' to 'verification-done-artful'. If the problem still exists,
change the tag 'verification-needed-artful' to 'verification-failed-
artful'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-artful

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

** Changed in: linux (Ubuntu)
   Status: Confirmed => Fix Released

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kleber Sacilotto de Souza]

** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Artful)
   Status: New => Fix Committed

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

** Description changed:

- After upgrading to 17.10 (from 16.04 with 4.4 kernel) my PCI DVB card
- Terratec Cinergy DVB-1200 with SAA7146 chipset is not working anymore.
- There is a kernel bug message while booting and no /dev/dvb device is
- created. Tried also with newest mainline 4.14 kernel - same error.
+ === SRU Justification ===
+ [Impact]
+ Callers vmalloc_32() expect the page is not located in highmem.
+ All users of vmalloc_32() have this issue, module saa7146 is one of
+ them.
+ 
+ [Test]
+ saa7146 crashes at probing. The issue is fixed with the patch.
+ 
+ [Fix]
+ Add GFP_DMA32 to GFP_VMALLOC32 flag for 32bits systems.
+ The patch is in stable trees, so only Artful needs this patch.
+ 
+ [Regression Potential]
+ Low. It's a crucial fix for 32bits systems.
+ 
+ === Original Bug Report ===
+ After upgrading to 17.10 (from 16.04 with 4.4 kernel) my PCI DVB card 
Terratec Cinergy DVB-1200 with SAA7146 chipset is not working anymore. There is 
a kernel bug message while booting and no /dev/dvb device is created. Tried 
also with newest mainline 4.14 kernel - same error.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: linux-image-4.13.0-25-generic 4.13.0-25.29
  ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
  Uname: Linux 4.13.0-25-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k4.13.0-25-generic.
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.7-0ubuntu3.7
  Architecture: i386
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', 
'/dev/snd/hwC0D1', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', 
'/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', 
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 
'amixer'
  Date: Wed Jan 10 00:42:24 2018
  HibernationDevice: RESUME=UUID=342e30a6-d71f-47c0-b65a-5ba657a80456
  InstallationDate: Installed on 2016-02-13 (696 days ago)
  InstallationMedia: Ubuntu-Server 15.10 "Wily Werewolf" - Release i386 
(20151021)
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=
-  LANG=de_DE.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=
+  LANG=de_DE.UTF-8
+  SHELL=/bin/bash
  ProcFB: 0 psbdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-25-generic 
root=UUID=97ea5186-d18d-4c06-a8b2-2dd1417477be ro splash quiet acpi=force 
video=LVDS-1:d vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-4.13.0-25-generic N/A
-  linux-backports-modules-4.13.0-25-generic  N/A
-  linux-firmware 1.169.1
+  linux-restricted-modules-4.13.0-25-generic N/A
+  linux-backports-modules-4.13.0-25-generic  N/A
+  linux-firmware 1.169.1
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: Upgraded to artful on 2016-07-07 (551 days ago)
  dmi.bios.date: 04/19/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.60
  dmi.board.name: AD2700-ITX
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP1.60:bd04/19/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAD2700-ITX:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

No not really.

I'll backport the patch once it's in Linus' tree.

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Kai-Heng Feng (kaihengfeng)

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Thanks, finally it's working. Do you need some additional infos/logs?

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Please try this kernel,
http://people.canonical.com/~khfeng/lp1742316-i386-3/

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

https://lkml.org/lkml/2018/2/8/19

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

The problem is that the commit you bisected implicitly use GFP_HIGHMEM
mask. A later commit, tries to alleviate the issue by not setting
GFP_HIGHMEM when GFP_DMA or GFP_DMA32 is set,

commit 704b862f9efd6d4c87a8d0a344dda19bda9c6b69
Author: Laura Abbott 
Date:   Fri Aug 18 15:16:27 2017 -0700

mm/vmalloc.c: don't unconditonally use __GFP_HIGHMEM

So add GFP_DMA32 or GFP_DMA should solve the issue, but it doesn't,
diff --git a/drivers/media/common/saa7146/saa7146_core.c 
b/drivers/media/common/saa7146/saa7146_core.c
index 9f7c5b0a6b45..69f127067aa1 100644
--- a/drivers/media/common/saa7146/saa7146_core.c
+++ b/drivers/media/common/saa7146/saa7146_core.c
@@ -152,7 +152,8 @@ static struct scatterlist* vmalloc_to_sg(unsigned char 
*virt, int nr_pages)
struct page *pg;
int i;
 
-   sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL);
+   sglist = __vmalloc(nr_pages * sizeof(struct scatterlist),
+  GFP_KERNEL | GFP_DMA | __GFP_ZERO, PAGE_KERNEL);
if (NULL == sglist)
return NULL;
sg_init_table(sglist, nr_pages);
@@ -166,7 +167,7 @@ static struct scatterlist* vmalloc_to_sg(unsigned char 
*virt, int nr_pages)
return sglist;
 
  err:
-   kfree(sglist);
+   vfree(sglist);
return NULL;
 }
 
@@ -203,7 +204,7 @@ void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, 
long length, struct saa
 err_free_pgtable:
saa7146_pgtable_free(pci, pt);
 err_free_slist:
-   kfree(pt->slist);
+   vfree(pt->slist);
pt->slist = NULL;
 err_free_mem:
vfree(mem);
@@ -215,7 +216,7 @@ void saa7146_vfree_destroy_pgtable(struct pci_dev *pci, 
void *mem, struct saa714
 {
pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE);
saa7146_pgtable_free(pci, pt);
-   kfree(pt->slist);
+   vfree(pt->slist);
pt->slist = NULL;
vfree(mem);
 }

I'll send a mail to ask the patch author, stay tuned.

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Sorry, this won't do it.
Can I help with some other logfiles?

[5.493739] [ cut here ]
[5.493742] kernel BUG at 
/home/khfeng/Sources/linux-lp1742316-saa7146/drivers/media/common/saa7146/saa7146_core.c:164!
[5.493760] invalid opcode:  [#1] SMP
[5.493764] Modules linked in: budget_av(+) saa7146_vv snd_hda_codec_hdmi 
budget_core snd_hda_codec_realtek ttpci_eeprom snd_hda_codec_generic saa7146 
snd_hda_intel snd_hda_codec videobuf_dma_sg videobuf_core snd_hda_core dvb_core 
snd_hwdep v4l2_common snd_pcm intel_powerclamp snd_timer videodev joydev snd 
media input_leds soundcore lpc_ich shpchp mac_hid nct6775 hwmon_vid coretemp 
ip_tables x_tables autofs4 hid_generic usbhid hid gma500_gfx i2c_algo_bit 
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci drm r8169 
libahci mii video
[5.493848] CPU: 2 PID: 290 Comm: systemd-udevd Not tainted 
4.14.0-17-generic #20
[5.493853] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./AD2700-ITX, BIOS P1.60 04/19/2013
[5.493860] task: f10e8000 task.stack: f4a0
[5.493872] EIP: saa7146_vmalloc_build_pgtable+0x190/0x1020 [saa7146]
[5.493876] EFLAGS: 00010246 CPU: 2
[5.493881] EAX: f22dd8f0 EBX: f8271000 ECX: 0002 EDX: fff1c000
[5.493886] ESI:  EDI: f868d000 EBP: f4a01c44 ESP: f4a01c20
[5.493892]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[5.493897] CR0: 80050033 CR2: 004f0860 CR3: 35389b00 CR4: 06f0
[5.493901] Call Trace:
[5.493915]  ttpci_budget_init+0x26c/0x530 [budget_core]
[5.493927]  ? budget_av_attach+0x3e/0x4e8 [budget_av]
[5.493938]  budget_av_attach+0x75/0x4e8 [budget_av]
[5.493950]  ? vprintk_func+0x29/0x70
[5.493956]  ? printk+0x13/0x15
[5.493964]  ? saa7146_init_one+0x69f/0x770 [saa7146]
[5.493973]  saa7146_init_one+0x70b/0x770 [saa7146]
[5.493982]  ? __pm_runtime_resume+0x51/0x80
[5.493991]  pci_device_probe+0xc2/0x160
[5.493998]  driver_probe_device+0x2b9/0x410
[5.494006]  __driver_attach+0x99/0xe0
[5.494012]  ? driver_probe_device+0x410/0x410
[5.494018]  bus_for_each_dev+0x57/0x90
[5.494025]  driver_attach+0x19/0x20
[5.494031]  ? driver_probe_device+0x410/0x410
[5.494037]  bus_add_driver+0x187/0x230
[5.494043]  ? 0xf8512000
[5.494049]  driver_register+0x56/0xd0
[5.494055]  ? 0xf8512000
[5.494061]  __pci_register_driver+0x3a/0x40
[5.494069]  saa7146_register_extension+0x50/0x80 [saa7146]
[5.494080]  budget_av_init+0xd/0x1000 [budget_av]
[5.494087]  do_one_initcall+0x46/0x180
[5.494094]  ? __schedule+0x298/0x8c0
[5.494101]  ? vunmap_page_range+0x13e/0x280
[5.494109]  ? kmem_cache_alloc_trace+0x165/0x1d0
[5.494116]  ? do_init_module+0x21/0x1cc
[5.494122]  ? do_init_module+0x21/0x1cc
[5.494129]  do_init_module+0x50/0x1cc
[5.494136]  load_module+0x1565/0x1a80
[5.494148]  SyS_finit_module+0x8a/0xe0
[5.494157]  do_fast_syscall_32+0x71/0x1d0
[5.494164]  entry_SYSENTER_32+0x4e/0x7c
[5.494169] EIP: 0xb7f30cf9
[5.494173] EFLAGS: 0296 CPU: 2
[5.494178] EAX: ffda EBX: 0018 ECX: b7d21a71 EDX: 
[5.494183] ESI: 02293da0 EDI: 02296000 EBP:  ESP: bf94450c
[5.494188]  DS: 007b ES: 007b FS:  GS: 0033 SS: 007b
[5.494193] Code: e8 e8 b5 eb ff ff 85 c0 59 75 7c 8b 45 ec 8d 65 f4 5b 5e 
5f 5d c3 90 8d 74 26 00 83 3d f0 6d e5 cf 02 0f 85 08 ff ff ff 8d 76 00 <0f> 0b 
8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 c7 45 dc 00 00
[5.494289] EIP: saa7146_vmalloc_build_pgtable+0x190/0x1020 [saa7146] 
SS:ESP: 0068:f4a01c20
[5.494295] ---[ end trace d23424db8c0ee325 ]---

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Hmmpf, please try this one,
people.canonical.com/~khfeng/lp1742316-dma/

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Thanks for your work, but the bug is still triggered - new codeline at
least ;-)

[5.405637] [ cut here ]
[5.405643] kernel BUG at 
/home/khfeng/Sources/linux-lp1742316-saa7146/drivers/media/common/saa7146/saa7146_core.c:164!
[5.405671] invalid opcode:  [#1] SMP
[5.405677] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek 
budget_av(+) snd_hda_codec_generic saa7146_vv snd_hda_intel budget_core 
ttpci_eeprom snd_hda_codec snd_hda_core saa7146 videobuf_dma_sg videobuf_core 
dvb_core snd_hwdep v4l2_common intel_powerclamp snd_pcm videodev snd_timer 
media joydev snd input_leds lpc_ich soundcore shpchp mac_hid nct6775 hwmon_vid 
coretemp ip_tables x_tables autofs4 hid_generic gma500_gfx usbhid hid 
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt ahci r8169 
fb_sys_fops libahci drm mii video
[5.405763] CPU: 0 PID: 288 Comm: systemd-udevd Not tainted 
4.14.0-17-generic #20
[5.405769] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./AD2700-ITX, BIOS P1.60 04/19/2013
[5.405776] task: f11b30c0 task.stack: f48c8000
[5.405789] EIP: saa7146_vmalloc_build_pgtable+0x190/0x1020 [saa7146]
[5.405794] EFLAGS: 00010246 CPU: 0
[5.405800] EAX: f22dd620 EBX: f8272000 ECX: 0002 EDX: fff1c000
[5.405806] ESI:  EDI: f84a4000 EBP: f48c9c44 ESP: f48c9c20
[5.405811]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[5.405817] CR0: 80050033 CR2: 017c7cf4 CR3: 313aa640 CR4: 06f0
[5.405822] Call Trace:
[5.405838]  ttpci_budget_init+0x26c/0x530 [budget_core]
[5.405851]  ? budget_av_attach+0x3e/0x4e8 [budget_av]
[5.405864]  budget_av_attach+0x75/0x4e8 [budget_av]
[5.405878]  ? vprintk_func+0x29/0x70
[5.405886]  ? printk+0x13/0x15
[5.405895]  ? saa7146_init_one+0x69f/0x770 [saa7146]
[5.405906]  saa7146_init_one+0x70b/0x770 [saa7146]
[5.405919]  ? __pm_runtime_resume+0x51/0x80
[5.405929]  pci_device_probe+0xc2/0x160
[5.405940]  driver_probe_device+0x2b9/0x410
[5.405949]  __driver_attach+0x99/0xe0
[5.405958]  ? driver_probe_device+0x410/0x410
[5.405966]  bus_for_each_dev+0x57/0x90
[5.405975]  driver_attach+0x19/0x20
[5.405982]  ? driver_probe_device+0x410/0x410
[5.405990]  bus_add_driver+0x187/0x230
[5.405997]  ? 0xf8727000
[5.406004]  driver_register+0x56/0xd0
[5.406011]  ? 0xf8727000
[5.406018]  __pci_register_driver+0x3a/0x40
[5.406029]  saa7146_register_extension+0x50/0x80 [saa7146]
[5.406043]  budget_av_init+0xd/0x1000 [budget_av]
[5.406053]  do_one_initcall+0x46/0x180
[5.406063]  ? kfree+0x155/0x170
[5.406071]  ? kfree+0x155/0x170
[5.406078]  ? kmem_cache_alloc_trace+0x165/0x1d0
[5.406086]  ? do_init_module+0x21/0x1cc
[5.406093]  ? do_init_module+0x21/0x1cc
[5.406102]  do_init_module+0x50/0x1cc
[5.406110]  load_module+0x1565/0x1a80
[5.406124]  SyS_finit_module+0x8a/0xe0
[5.406135]  do_fast_syscall_32+0x71/0x1d0
[5.406145]  entry_SYSENTER_32+0x4e/0x7c
[5.406151] EIP: 0xb7f3ecf9
[5.406156] EFLAGS: 0296 CPU: 0
[5.406162] EAX: ffda EBX: 0018 ECX: b7d2fa71 EDX: 
[5.406167] ESI: 017bc9d0 EDI: 017b9310 EBP:  ESP: bf9ab29c
[5.406173]  DS: 007b ES: 007b FS:  GS: 0033 SS: 007b
[5.406180] Code: e8 e8 b5 eb ff ff 85 c0 59 75 7c 8b 45 ec 8d 65 f4 5b 5e 
5f 5d c3 90 8d 74 26 00 83 3d f0 6d e5 c8 02 0f 85 08 ff ff ff 8d 76 00 <0f> 0b 
8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 c7 45 dc 00 00
[5.406289] EIP: saa7146_vmalloc_build_pgtable+0x190/0x1020 [saa7146] 
SS:ESP: 0068:f48c9c20
[5.406319] ---[ end trace e0fc7bfda2220079 ]---

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

We need to use GFP_DMA32 for vmalloc, please try this kernel,

people.canonical.com/~khfeng/lp1742316-dma32/

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Unfortunately it's not working, but the bug is at another codeline, so
maybe another problem? Or the same problem is in the code multiple
times?

 [ cut here ]
[5.990508] kernel BUG at 
/home/khfeng/Sources/linux-lp1742316-saa7146/drivers/media/common/saa7146/saa7146_core.c:166!
[5.990519] invalid opcode:  [#1] SMP
[5.990521] Modules linked in: ppdev snd_hda_codec_realtek(+) 
snd_hda_codec_generic budget_av(+) saa7146_vv snd_hda_intel budget_core 
ttpci_eeprom snd_hda_codec saa7146 snd_hda_core videobuf_dma_sg videobuf_core 
snd_hwdep dvb_core snd_pcm v4l2_common snd_timer videodev snd intel_powerclamp 
joydev media lpc_ich input_leds soundcore shpchp parport_pc nuvoton_cir parport 
rc_core mac_hid nct6775 hwmon_vid coretemp ip_tables x_tables autofs4 
hid_generic usbhid hid gma500_gfx i2c_algo_bit drm_kms_helper syscopyarea 
sysfillrect sysimgblt r8169 ahci fb_sys_fops drm libahci mii video
[5.990587] CPU: 1 PID: 301 Comm: systemd-udevd Not tainted 
4.13.0-33-generic #36
[5.990589] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./AD2700-ITX, BIOS P1.60 04/19/2013
[5.990591] task: f49bf500 task.stack: f4986000
[5.990601] EIP: saa7146_vmalloc_build_pgtable+0x188/0x1020 [saa7146]
[5.990603] EFLAGS: 00010246 CPU: 1
[5.990605] EAX: f1ce7d88 EBX: f8236000 ECX: 0002 EDX: fff1c000
[5.990608] ESI:  EDI: f84f2000 EBP: f4987c44 ESP: f4987c20
[5.990610]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[5.990613] CR0: 80050033 CR2: b7b6715c CR3: 34935d60 CR4: 06f0
[5.990615] Call Trace:
[5.990627]  ttpci_budget_init+0x26c/0x530 [budget_core]
[5.990637]  budget_av_attach+0x75/0x4e8 [budget_av]
[5.990646]  ? vprintk_func+0x29/0x70
[5.990650]  ? printk+0x13/0x15
[5.990655]  ? saa7146_init_one+0x69f/0x770 [saa7146]
[5.990661]  saa7146_init_one+0x70b/0x770 [saa7146]
[5.990667]  ? __pm_runtime_resume+0x51/0x80
[5.990673]  pci_device_probe+0xc2/0x160
[5.990679]  driver_probe_device+0x2b9/0x410
[5.990683]  __driver_attach+0x99/0xe0
[5.990687]  ? driver_probe_device+0x410/0x410
[5.990691]  bus_for_each_dev+0x57/0x90
[5.990695]  driver_attach+0x19/0x20
[5.990698]  ? driver_probe_device+0x410/0x410
[5.990702]  bus_add_driver+0x187/0x230
[5.990705]  ? 0xf826e000
[5.990709]  driver_register+0x56/0xd0
[5.990712]  ? 0xf826e000
[5.990715]  __pci_register_driver+0x33/0x40
[5.990721]  saa7146_register_extension+0x50/0x80 [saa7146]
[5.990730]  budget_av_init+0xd/0x1000 [budget_av]
[5.990735]  do_one_initcall+0x46/0x180
[5.990741]  ? vunmap_page_range+0x13e/0x280
[5.990746]  ? kvfree+0x45/0x50
[5.990750]  ? kmem_cache_alloc_trace+0x13d/0x1a0
[5.990754]  ? do_init_module+0x21/0x1cc
[5.990758]  ? do_init_module+0x21/0x1cc
[5.990762]  do_init_module+0x50/0x1cc
[5.990765]  load_module+0x1533/0x1aa0
[5.990772]  ? kernel_read_file+0x26e/0x2a0
[5.990778]  SyS_finit_module+0x8a/0xe0
[5.990785]  do_fast_syscall_32+0x71/0x150
[5.990791]  entry_SYSENTER_32+0x4e/0x7c
[5.990794] EIP: 0xb7f5acf9
[5.990795] EFLAGS: 0296 CPU: 1
[5.990798] EAX: ffda EBX: 0018 ECX: b7d4ba71 EDX: 
[5.990800] ESI: 0241e980 EDI: 02417940 EBP:  ESP: bffc10ac
[5.990803]  DS: 007b ES: 007b FS:  GS: 0033 SS: 007b
[5.990806] Code: e8 e8 bd eb ff ff 85 c0 59 75 7c 8b 45 ec 8d 65 f4 5b 5e 
5f 5d c3 90 8d 74 26 00 83 3d f0 ec e1 d3 02 0f 85 0c ff ff ff 8d 76 00 <0f> 0b 
8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 c7 45 dc 00 00
[5.990875] EIP: saa7146_vmalloc_build_pgtable+0x188/0x1020 [saa7146] 
SS:ESP: 0068:f4987c20
[5.990879] ---[ end trace b40ecb3f8210604e ]---

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Hmm I think my previous kernel won't work because your system is 32bit.
I'll build a new one soon.

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Please try this kernel,
http://people.canonical.com/~khfeng/lp1742316-i386-2/

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

It took 14 steps, but finally here is the possible culprit:

19809c2da28aee5860ad9a2eff760730a0710df0 is the first bad commit
commit 19809c2da28aee5860ad9a2eff760730a0710df0
Author: Michal Hocko 
Date:   Mon May 8 15:57:44 2017 -0700

mm, vmalloc: use __GFP_HIGHMEM implicitly

__vmalloc* allows users to provide gfp flags for the underlying
allocation.  This API is quite popular

  $ git grep "=[[:space:]]__vmalloc\|return[[:space:]]*__vmalloc" | wc -l
  77

The only problem is that many people are not aware that they really want
to give __GFP_HIGHMEM along with other flags because there is really no
reason to consume precious lowmemory on CONFIG_HIGHMEM systems for pages
which are mapped to the kernel vmalloc space.  About half of users don't
use this flag, though.  This signals that we make the API unnecessarily
too complex.

This patch simply uses __GFP_HIGHMEM implicitly when allocating pages to
be mapped to the vmalloc space.  Current users which add __GFP_HIGHMEM
are simplified and drop the flag.

Link: http://lkml.kernel.org/r/20170307141020.29107-1-mho...@kernel.org
Signed-off-by: Michal Hocko 
Reviewed-by: Matthew Wilcox 
Cc: Al Viro 
Cc: Vlastimil Babka 
Cc: David Rientjes 
Cc: Cristopher Lameter 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 

:04 04 5cdc1c298cd62f74b76602846ce13ef386b06f22 
d35baa52e7f078b35eb659fe2926c20c0867ed9e M  arch
:04 04 045c832d50bf5255b42bdb0f28b09d36087a10eb 
72610cae50071293567c229360546df0b99baae4 M  drivers
:04 04 11f420f52bd9613ce1a1b0b01e3cbbd287a7b729 
d3b957b5a886ba12041462588c323521961f368e M  fs
:04 04 035a87f5c946730440625485bab4283ba03cbf3a 
311929864121b80809596cc34d36b83bd6b8b9a6 M  include
:04 04 46bcc13bebdc7f704db764542b6fae0a6362f64d 
c5674e6547e15e4a879576971fab242e1513e7e2 M  kernel
:04 04 e11579b380817b207dd328539bbfa23723d7af95 
ffc174b7261fcffcd52bfac24994469ccf5c7d12 M  mm
:04 04 8357adc979b4be710b3d295425ac8c7ecd31b34d 
31058e41d6828bcd7a9c9daf7a45cfa46dcd3ec4 M  net

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd linux
$ git bisect start
$ git bisect good v4.11
$ git bisect bad v4.12-rc1
$ make localmodconfig
$ make -j`nproc` deb-pkg
Install the newly built kernel.
If the issue still happens,
$ git bisect bad
Otherwise,
$ git bisect good
Repeat to "make -j`nproc` deb-pkg" until you find the commit that causes the 
regression.

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Thanks for trying, but unfortunately your kernel does not resolve the
problem:

4.13.0-32-generic #35~lp1742316 SMP Fri Jan 26 21:40:59 CST 2018 i686
i686 i686 GNU/Linux


[6.429543] [ cut here ]
[6.429548] kernel BUG at 
/home/khfeng/Sources/linux-lp1742316-saa7146/drivers/media/common/saa7146/saa7146_core.c:163!
[6.429561] invalid opcode:  [#1] SMP
[6.429708] Modules linked in: snd_hda_codec_hdmi(+) snd_hda_codec_realtek 
budget_av(+) saa7146_vv snd_hda_codec_generic budget_core ttpci_eeprom 
snd_hda_intel saa7146 ppdev videobuf_dma_sg videobuf_core dvb_core v4l2_common 
snd_hda_codec videodev snd_hda_core snd_hwdep intel_powerclamp media joydev 
input_leds snd_pcm lpc_ich snd_timer snd soundcore shpchp parport_pc parport 
nuvoton_cir mac_hid rc_core nct6775 hwmon_vid coretemp ip_tables x_tables 
autofs4 hid_generic usbhid hid gma500_gfx i2c_algo_bit drm_kms_helper 
syscopyarea sysfillrect sysimgblt ahci fb_sys_fops libahci drm r8169 mii video
[6.431394] CPU: 3 PID: 306 Comm: systemd-udevd Not tainted 
4.13.0-32-generic #35~lp1742316
[6.431654] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./AD2700-ITX, BIOS P1.60 04/19/2013
[6.431949] task: f5202700 task.stack: f4886000
[6.432108] EIP: saa7146_vmalloc_build_pgtable+0x180/0x1020 [saa7146]
[6.432301] EFLAGS: 00010246 CPU: 3
[6.432406] EAX: f21e2568 EBX: f8365000 ECX: 0002 EDX: fff1c000
[6.432592] ESI:  EDI: f871f000 EBP: f4887c44 ESP: f4887c20
[6.432784]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[6.432954] CR0: 80050033 CR2: 00b6e924 CR3: 35048940 CR4: 06f0
[6.433142] Call Trace:
[6.433229]  ttpci_budget_init+0x26c/0x530 [budget_core]
[6.433398]  budget_av_attach+0x75/0x4e8 [budget_av]
[6.433556]  ? vprintk_func+0x29/0x70
[6.433666]  ? printk+0x13/0x15
[6.433767]  ? saa7146_init_one+0x69f/0x770 [saa7146]
[6.433925]  saa7146_init_one+0x70b/0x770 [saa7146]
[6.434080]  ? __pm_runtime_resume+0x51/0x80
[6.434213]  pci_device_probe+0xc2/0x160
[6.434328]  driver_probe_device+0x2b9/0x410
[6.434457]  __driver_attach+0x99/0xe0
[6.434575]  ? driver_probe_device+0x410/0x410
[6.434708]  bus_for_each_dev+0x57/0x90
[6.434832]  driver_attach+0x19/0x20
[6.434937]  ? driver_probe_device+0x410/0x410
[6.440934]  bus_add_driver+0x187/0x230
[6.440938]  ? 0xf8522000
[6.440943]  driver_register+0x56/0xd0
[6.440946]  ? 0xf8522000
[6.440950]  __pci_register_driver+0x33/0x40
[6.440957]  saa7146_register_extension+0x50/0x80 [saa7146]
[6.440966]  budget_av_init+0xd/0x1000 [budget_av]
[6.440971]  do_one_initcall+0x46/0x180
[6.440977]  ? kfree+0x134/0x140
[6.440980]  ? kfree+0x134/0x140
[6.440983]  ? kfree+0x134/0x140
[6.440987]  ? kmem_cache_alloc_trace+0x13d/0x1a0
[6.440992]  ? do_init_module+0x21/0x1cc
[6.440995]  ? do_init_module+0x21/0x1cc
[6.441000]  do_init_module+0x50/0x1cc
[6.441004]  load_module+0x1533/0x1aa0
[6.441011]  ? kernel_read_file+0x26e/0x2a0
[6.441018]  SyS_finit_module+0x8a/0xe0
[6.441025]  do_fast_syscall_32+0x71/0x150
[6.441032]  entry_SYSENTER_32+0x4e/0x7c
[6.441034] EIP: 0xb7f5acf9
[6.441036] EFLAGS: 0292 CPU: 3
[6.441039] EAX: ffda EBX: 0018 ECX: b7d4ba71 EDX: 
[6.441042] ESI: 01a60ec0 EDI: 01a5e940 EBP:  ESP: bfc713bc
[6.441045]  DS: 007b ES: 007b FS:  GS: 0033 SS: 007b
[6.441049] Code: e8 e8 c5 eb ff ff 85 c0 59 75 7c 8b 45 ec 8d 65 f4 5b 5e 
5f 5d c3 90 8d 74 26 00 83 3d f0 ec e1 dd 02 0f 85 07 ff ff ff 8d 76 00 <0f> 0b 
8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 c7 45 dc 00 00
[6.441125] EIP: saa7146_vmalloc_build_pgtable+0x180/0x1020 [saa7146] 
SS:ESP: 0068:f4887c20
[6.441210] ---[ end trace 4087a60d1b1a4971 ]---

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

There you go,
http://people.canonical.com/~khfeng/lp1742316-i386/

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Thanks for your work, but could you build the kernel for i386 platform,
as my system (Atom D2700) does not support amd64 due to bios
restrictions?

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Please try kernel here:
http://people.canonical.com/~khfeng/lp1742316/

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Title:
  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

I've tried some of the mainline kernels and finally got to this situation:
last working kernel: v4.11.12 mainline build [1]
first non working kernel: v4.12-rc1 mainline build [2]

Hope that will help to find the bug.

[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11.12/
[2] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc1/

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Kai-Heng Feng]

Please follow [1] to find the first bad -rc kernel.

Then we can use `git bisect` to find the first bad commit.

[1] https://wiki.ubuntu.com/Kernel/KernelBisection

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[TauSo]

Unfortunatly the same problem:

[6.201796] [ cut here ]
[6.201799] kernel BUG at 
/home/kernel/COD/linux/drivers/media/common/saa7146/saa7146_core.c:163!
[6.201812] invalid opcode:  [#1] SMP
[6.201814] Modules linked in: snd_hda_codec_generic snd_hda_intel 
budget_av(+) snd_hda_codec saa7146_vv snd_hda_core budget_core ttpci_eeprom 
snd_hwdep saa7146 snd_pcm intel_powerclamp videobuf_dma_sg videobuf_core 
dvb_core v4l2_common snd_timer videodev snd input_leds joydev lpc_ich media 
soundcore shpchp mac_hid nct6775 hwmon_vid coretemp ip_tables x_tables autofs4 
uas usb_storage hid_generic usbhid hid gma500_gfx i2c_algo_bit drm_kms_helper 
syscopyarea sysfillrect sysimgblt r8169 fb_sys_fops ahci drm libahci mii video
[6.201882] CPU: 3 PID: 293 Comm: systemd-udevd Not tainted 
4.15.0-041500rc7-generic #201801072330
[6.201884] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./AD2700-ITX, BIOS P1.60 04/19/2013
[6.201895] EIP: saa7146_vmalloc_build_pgtable+0x140/0x1020 [saa7146]
[6.201897] EFLAGS: 00010246 CPU: 3
[6.201900] EAX: f24b8908 EBX: f478b800 ECX: 0002 EDX: fff1c000
[6.201903] ESI:  EDI: f864a000 EBP: f4b65c44 ESP: f4b65c24
[6.201906]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[6.201910] CR0: 80050033 CR2: 00587024 CR3: 310b72a0 CR4: 06f0
[6.201912] Call Trace:
[6.201925]  ttpci_budget_init+0x26c/0x530 [budget_core]
[6.201935]  ? budget_av_attach+0x3e/0x4e8 [budget_av]
[6.201944]  budget_av_attach+0x75/0x4e8 [budget_av]
[6.201954]  ? vprintk_func+0x29/0x70
[6.201959]  ? printk+0x13/0x15
[6.201965]  ? saa7146_init_one+0x69f/0x770 [saa7146]
[6.201971]  saa7146_init_one+0x70b/0x770 [saa7146]
[6.201979]  ? __pm_runtime_resume+0x51/0x80
[6.201985]  pci_device_probe+0xc2/0x160
[6.201991]  driver_probe_device+0x2d9/0x450
[6.201996]  __driver_attach+0x99/0xe0
[6.202000]  ? driver_probe_device+0x450/0x450
[6.202005]  bus_for_each_dev+0x57/0x90
[6.202010]  driver_attach+0x19/0x20
[6.202014]  ? driver_probe_device+0x450/0x450
[6.202018]  bus_add_driver+0x187/0x230
[6.202022]  ? 0xf8334000
[6.202026]  driver_register+0x56/0xd0
[6.202030]  ? 0xf8334000
[6.202035]  __pci_register_driver+0x3a/0x40
[6.202041]  saa7146_register_extension+0x50/0x80 [saa7146]
[6.202050]  budget_av_init+0x12/0x1000 [budget_av]
[6.202055]  do_one_initcall+0x46/0x170
[6.202061]  ? vunmap_page_range+0x13e/0x280
[6.202067]  ? _cond_resched+0x17/0x40
[6.202073]  ? kmem_cache_alloc_trace+0x165/0x1d0
[6.202078]  ? do_init_module+0x21/0x1ec
[6.202082]  ? do_init_module+0x21/0x1ec
[6.202087]  do_init_module+0x50/0x1ec
[6.202092]  load_module+0x1565/0x1a80
[6.202102]  SyS_finit_module+0x8a/0xe0
[6.202110]  do_fast_syscall_32+0x71/0x1d0
[6.202116]  entry_SYSENTER_32+0x4e/0x7c
[6.202119] EIP: 0xb7eeccf9
[6.202121] EFLAGS: 0292 CPU: 3
[6.202124] EAX: ffda EBX: 0018 ECX: b7cdda71 EDX: 
[6.202127] ESI: 01547e30 EDI: 0154a2f0 EBP:  ESP: bfb3355c
[6.202129]  DS: 007b ES: 007b FS:  GS: 0033 SS: 007b
[6.202133] Code: 50 8b 45 e4 e8 02 ec ff ff 85 c0 59 75 60 8b 45 ec 8d 65 
f4 5b 5e 5f 5d c3 66 90 83 3d 2c 1d e7 c5 02 0f 85 4c ff ff ff 8d 76 00 <0f> 0b 
8d b6 00 00 00 00 0f 0b 8d b6 00 00 00 00 31 ff 8b 1d b0
[6.202209] EIP: saa7146_vmalloc_build_pgtable+0x140/0x1020 [saa7146] 
SS:ESP: 0068:f4b65c24
[6.202214] ---[ end trace 3619646989f934cf ]---


** Tags added: kernel-bug-exists-upstream

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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  DVB Card with SAA7146 chipset not working

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[Bug 1742316] Re: DVB Card with SAA7146 chipset not working

[Joseph Salisbury]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.15 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc7

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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  DVB Card with SAA7146 chipset not working

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