Launchpad has imported 36 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=108514.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2018-10-22T16:07:16+00:00 Werner-lueckel-m wrote: my laptop: HP Compaq nx9420 my grafic card: 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV530/M56-P [Mobility Radeon X1600] (prog-if 00 [VGA controller]) screen resolution: 1680x1050@60.1 when booting UBUNTU "14.04.5 LTS, Trusty Tahr" kernel 3.13.0-160-generic -> the screen is fine in text-mode and in grafic-mode; NO flickering. boot-messages say: [drm] Initialized radeon 2.36.0 ... BUT, when booting UBUNTU "18.04.1 LTS (Bionic Beaver)" kernel 4.15.0-36-generic -> the screen starts heavy flickering as soon as the kernel-module "radeon.ko" is loaded. The flickering continues in grafic-mode. here the boot-messages say: [drm] Initialized radeon 2.50.0 ... so: this seems to be a new version of radeon.ko. My question: - is there a method or a 'hidden flag' to switch radeon.ko-2.50 back to the good behaviour of radeon.ko-2.16? Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/8 ------------------------------------------------------------------------ On 2018-10-22T18:14:39+00:00 Alexdeucher wrote: Any chance you can narrow down when the regression occurred and bisect it using git? Please attach your dmesg output and xorg log (if using X). Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/9 ------------------------------------------------------------------------ On 2018-10-23T16:31:25+00:00 Werner-lueckel-m wrote: Created attachment 142154 dmesg Ubuntu14.04, Kernel3.13.0-160, radeon 2.36.0, screen O.K. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/10 ------------------------------------------------------------------------ On 2018-10-23T16:34:59+00:00 Werner-lueckel-m wrote: Created attachment 142155 dmesg Ubuntu18.04, Kernel4.15.0-36, radeon 2.50.0, screen flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/11 ------------------------------------------------------------------------ On 2018-10-23T16:45:12+00:00 Werner-lueckel-m wrote: - I attached 2 dmesg-listings; booting Ubuntu14.04, Kernel3.13 -> screen is o.k.; no flickering booting Ubuntu18.04, Kernel4.15 -> screen flickers. - no Xorg log since the flickering happens already in text-mode - I did the following test (on Ubuntu18.04): . boot with radeon.modeset=0 (thus: disable radeon driver) -> screen o.k.; NO flickering . then sudo modprobe -v radeon modeset=1 -> and the flickering starts ... Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/12 ------------------------------------------------------------------------ On 2018-10-23T17:07:33+00:00 Werner-lueckel-m wrote: Created attachment 142156 dmesg Ubuntu14.04, Kernel4.4.0-133, radeon 2.43.0, screen flickering ... and I found out that the screen-flickering already starts with VERSION="14.04.5 LTS, Trusty Tahr" kernel: 4.4.0-133-generic radeon 2.43.0 see the attached dmesg14.04_4.4.0-133.txt Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/13 ------------------------------------------------------------------------ On 2018-10-24T13:29:58+00:00 Werner-lueckel-m wrote: Additional Information: - I have the same flickering screen with Debian Life CD: UBCD-life Linux version 3.16.0-4-586 [drm] Initialized radeon 2.39.0 20080528 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/14 ------------------------------------------------------------------------ On 2018-10-30T15:54:54+00:00 Werner-lueckel-m wrote: some more tests with different systems give the following table: sorted by radeon-version system kernel radeon result ------------------------- ----------- -------- -------- UBUNTU 14.04.5 LTS, Trusty Tahr 3.13.0-161 2.36.0 O.K. puppy_tahr 6.0.5 3.14.56 2.37.0 O.K. puppy_slacko 6.3.2 3.14.55 2.37.0 O.K UBCD 3.16.0 2.39.0 FLICKER puppy_xenialpup 7.5 4.4.95 2.43.0 FLICKER UBUNTU 14.04.5 LTS, Trusty Tahr 4.4.0-133 2.43.0 FLICKER UBUNTU 18.04.1 LTS (Bionic Beaver) 4.15.0-36 2.50.0 FLICKER so the problem seems to start with a radeon.ko driver > 2.37.0; I wonder how the radeon-version 2.38.0 would work, but, so far, I havn't found a system including it. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/15 ------------------------------------------------------------------------ On 2018-11-04T14:41:20+00:00 Werner-lueckel-m wrote: more tests with flickering screen: - check modelines "xvidtune -show -display :0" 14.04 trusty (NO flickering) "1680x1050" 122.00 1680 1712 1776 1904 1050 1051 1054 1066 -hsync -vsync 18.04.1 LTS (Flickering screen) "1680x1050" 122.00 1680 1712 1776 1904 1050 1051 1054 1066 -hsync -vsync -> exactly the same - on 18.04.1 LTS (1) with flickering grafic screen: repeatedly switch the screen-mode (xrandr): to 1440x900 and back to 1680x1050 -> typically after 2...5 repetitions the screen is o.k. and stops flickering (2) BUT: when the screen awakes from "sleep" -> the flickering starts again! switch to text-console (F1) -> flickers too! switch back to grafic (F7) -> flickering continues the I may continue with (1) OR (frustrated): BOOT 14.04 trusty; which still works fine; excellent grafic; never flickers; ... and start working! - BUT: what can I do when support for "14.04 trusty" ends? Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/16 ------------------------------------------------------------------------ On 2018-11-04T14:43:28+00:00 Werner-lueckel-m wrote: (In reply to Alex Deucher from comment #1) > Any chance you can narrow down when the regression occurred and bisect it > using git? Please attach your dmesg output and xorg log (if using X). I tried to narrow down the flickering issue making several tests; see my comments below. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/17 ------------------------------------------------------------------------ On 2018-11-04T14:48:47+00:00 Werner-lueckel-m wrote: (In reply to Alex Deucher from comment #1) > Any chance you can narrow down when the regression occurred and bisect it > using git? Please attach your dmesg output and xorg log (if using X). ... sorry, by comments are not below, but "above" ... Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/18 ------------------------------------------------------------------------ On 2018-12-04T14:39:31+00:00 Klaus-weiss wrote: (In reply to Werner Lueckel from comment #8) > > - BUT: what can I do when support for "14.04 trusty" ends? Try radeon.new_pll=0 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/19 ------------------------------------------------------------------------ On 2018-12-07T16:40:37+00:00 Werner-lueckel-m wrote: thank you for your tip, but radeon.new_pll=0 gives me ... radeon: unknown parameter 'new_pll' ignored And: I cannot find 'new_pll' in 'modinfo -p radeon'; So new_pll seems to be (no longer?) a radeon parameter. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/20 ------------------------------------------------------------------------ On 2019-02-06T19:34:48+00:00 Paul Dufresne wrote: I am comparing PLL values for a not flickering kernel: Linux version 3.14.79-031479-generic and version 4.15 (recent one): Linux 4.15: Flickering values [ 5.554557] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7 [ 465.773119] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7 [ 503.796178] [drm:radeon_compute_pll_avivo [radeon]] 122000 - 121980, pll dividers - fb: 253.0 ref: 8, post 7 Linux version 3.14.79-031479-generic: no flickering [4.250932] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8 ref: 6, post 7 [ 230.376566] [drm:radeon_compute_pll_avivo], 12201, pll dividers - fb: 189.8 ref: 6, post 7 122000 is about 10x 12201 I don't know what are these values, but it seems very different! Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/33 ------------------------------------------------------------------------ On 2019-02-06T22:42:55+00:00 Paul Dufresne wrote: I had determined that 3.15-rc2 was the first version where flickering appears. I guess it could be related to: https://lists.freedesktop.org/archives/dri-devel/2014-April/057800.html Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/34 ------------------------------------------------------------------------ On 2019-02-07T19:38:14+00:00 Paul Dufresne wrote: Created attachment 143324 Paul's dmesg with drm.debug=4 on kernel 3.14_79 (No flickering) Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/35 ------------------------------------------------------------------------ On 2019-02-07T19:40:15+00:00 Paul Dufresne wrote: Created attachment 143325 Paul Dufresne's Xorg.0.log for k3.14.79 no_flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/36 ------------------------------------------------------------------------ On 2019-02-07T19:53:01+00:00 Paul Dufresne wrote: Created attachment 143326 dufresnep's dmesg for kernel 4.15.0-45-generic (Linux Mint) with drm.debug=4 with a lot of flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/37 ------------------------------------------------------------------------ On 2019-02-07T19:54:39+00:00 Paul Dufresne wrote: Created attachment 143327 dufresnep's Xorg.0.log for kernel 4.15.0-45 (Mint 19) with drm.debug=4 lots of flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/38 ------------------------------------------------------------------------ On 2019-02-07T21:34:51+00:00 Paul Dufresne wrote: Created attachment 143328 dufresnep's dmesg for kernel 4.15.0-45-generic with drm.debug=0 with strangely no flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/39 ------------------------------------------------------------------------ On 2019-02-07T21:36:20+00:00 Paul Dufresne wrote: Created attachment 143329 dufresnep's xorg log for kernel 4.15.0 with drm.debug=0 strangely without flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/40 ------------------------------------------------------------------------ On 2019-02-07T21:58:28+00:00 Paul Dufresne wrote: Created attachment 143330 dmesg for kernel 5.0rc5 with flickering and debug=4 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/41 ------------------------------------------------------------------------ On 2019-02-07T22:04:37+00:00 Paul Dufresne wrote: Created attachment 143331 Xorg.0.log for kernel 50rc5 with flickering flickering had began only when in graphics mode ... usually begins while text display at boot Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/42 ------------------------------------------------------------------------ On 2019-02-07T22:53:04+00:00 Paul Dufresne wrote: Created attachment 143332 dufrp's Xorg.0.log for kernel 5.0rc5 (xstart as root) with no flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/43 ------------------------------------------------------------------------ On 2019-02-07T22:54:34+00:00 Paul Dufresne wrote: Created attachment 143333 dufrp's dmesg for kernel 5.0rc5 (xstarted as root) with no flickering Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/44 ------------------------------------------------------------------------ On 2019-02-07T23:02:30+00:00 Paul Dufresne wrote: Created attachment 143334 output of sudo dmidecode > dmidecode.txr Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/45 ------------------------------------------------------------------------ On 2019-02-07T23:05:29+00:00 Paul Dufresne wrote: Created attachment 143335 sudo lspci -nnvvk > lspci_while_flickering.txt Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/46 ------------------------------------------------------------------------ On 2019-02-12T21:43:08+00:00 Paul Dufresne wrote: I have done a git bisect: client@client-LIFEBOOK-AH531 ~/mylinux $ git bisect good f8a2645ecede4eaf90b3d785f2805c8ecb76d43e is the first bad commit commit f8a2645ecede4eaf90b3d785f2805c8ecb76d43e Author: Christian König <christian.koe...@amd.com> Date: Wed Apr 16 11:54:21 2014 +0200 drm/radeon: improve PLL params if we don't match exactly v2 Otherwise we might be quite off on older chipsets. v2: keep ref_div minimum Signed-off-by: Christian König <christian.koe...@amd.com> :040000 040000 a2150329e19966a1eb911d1d1ac74e865f002b1b 7220bfcf2fad7f94f071376fdd5aedd3d358545c M drivers client@client-LIFEBOOK-AH531 ~/mylinux $ Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/48 ------------------------------------------------------------------------ On 2019-02-12T21:43:58+00:00 Paul Dufresne wrote: client@client-LIFEBOOK-AH531 ~/mylinux $ git bisect log # bad: [a798c10faf62a505d24e5f6213fbaf904a39623f] Linux 3.15-rc2 # good: [c9eaa447e77efe77b7fa4c953bd62de8297fd6c5] Linux 3.15-rc1 git bisect start 'v3.15-rc2' 'v3.15-rc1' '--' 'drivers/gpu/drm/radeon' # good: [681941c1790b92207334d08ee017007685f35438] drm/radeon: fix VCE fence command git bisect good 681941c1790b92207334d08ee017007685f35438 # skip: [8902e6f2b832e00e10c6f9e9532f6f63feb4972f] drm/radeon: Improve vramlimit module param documentation git bisect skip 8902e6f2b832e00e10c6f9e9532f6f63feb4972f # bad: [bcddee29b0b87af3aeda953840f97b356b24dc5e] drm/radeon/ci: make sure mc ucode is loaded before checking the size git bisect bad bcddee29b0b87af3aeda953840f97b356b24dc5e # bad: [f8a2645ecede4eaf90b3d785f2805c8ecb76d43e] drm/radeon: improve PLL params if we don't match exactly v2 git bisect bad f8a2645ecede4eaf90b3d785f2805c8ecb76d43e # good: [74073c9dd29905645feb6dee03c144657a9844cd] drm/radeon: memory leak on bo reservation failure. v2 git bisect good 74073c9dd29905645feb6dee03c144657a9844cd # first bad commit: [f8a2645ecede4eaf90b3d785f2805c8ecb76d43e] drm/radeon: improve PLL params if we don't match exactly v2 client@client-LIFEBOOK-AH531 ~/mylinux $ Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/49 ------------------------------------------------------------------------ On 2019-02-12T21:49:48+00:00 Paul Dufresne wrote: Created attachment 143368 git show of firt bad commit Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/50 ------------------------------------------------------------------------ On 2019-02-14T21:36:55+00:00 Paul Dufresne wrote: The following patch seems to work for me: client@client-LIFEBOOK-AH531 ~/Téléchargements $ diff -u old/linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c --- old/linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c 2019-02-12 13:47:27.000000000 -0500 +++ linux-4.19.21/drivers/gpu/drm/radeon/radeon_display.c 2019-02-14 15:29:37.743229474 -0500 @@ -921,12 +921,14 @@ ref_div_max = max(min(100 / post_div, ref_div_max), 1u); /* get matching reference and feedback divider */ - *ref_div = min(max(DIV_ROUND_CLOSEST(den, post_div), 1u), ref_div_max); + // was: *ref_div = min(max(DIV_ROUND_CLOSEST(den, post_div), 1u), ref_div_max); + *ref_div = min(max((den/post_div), 1u), ref_div_max); *fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den); /* limit fb divider to its maximum */ if (*fb_div > fb_div_max) { - *ref_div = DIV_ROUND_CLOSEST(*ref_div * fb_div_max, *fb_div); + // was: *ref_div = DIV_ROUND_CLOSEST(*ref_div * fb_div_max, *fb_div); + *ref_div = (*ref_div * fb_div_max) / (*fb_div); *fb_div = fb_div_max; } } client@client-LIFEBOOK-AH531 ~/Téléchargements $ Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/52 ------------------------------------------------------------------------ On 2019-02-14T22:22:10+00:00 Paul Dufresne wrote: Created attachment 143381 .config file specifically for Compaq NX9420 on linux 4.19.21 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/53 ------------------------------------------------------------------------ On 2019-02-19T21:25:11+00:00 Paul Dufresne wrote: Created attachment 143413 patch radeon-display.c for latest kernel (5.0.0-rc7) Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/54 ------------------------------------------------------------------------ On 2019-04-15T13:07:31+00:00 Werner-lueckel-m wrote: Thanks to Paul Dufresne a patch in "radeon_display.c" seems to fix the bug. So the radeon maintainers should work on an upstream fix. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/57 ------------------------------------------------------------------------ On 2019-05-06T14:18:23+00:00 Werner-lueckel-m wrote: Is there any chance to get the patch implemented into 18.04 LTS? The flickering screen is really annoying ... Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/58 ------------------------------------------------------------------------ On 2019-05-15T06:36:47+00:00 Bholeshankar1992crax wrote: Whatsapp is well known messenger app.It is used worldwide for messaging when we download status from it we can face problem. By the use of this site https://downloadstatus.xyz we can download it for free. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1791312/comments/60 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791312 Title: ubuntu 18.04 flickering screen with Radeon X1600 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1791312/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
