Thanks for the response and sorry for the delay! I actually don't burn optical discs very often anymore and needed to wait for another opportunity to arise (my discs are DVD+R which don't work with simulated writing, and I didn't want to waste them in order to test).
With -speed=1, growisofs still writes at maximum speed (16x). However, with xorrecord, the speed control works fine. Thanks for suggesting those tools; my GNU/Linux burning knowledge has been out of date for a while and I lost track of all the forks. :-) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to dvd+rw-tools in Ubuntu. https://bugs.launchpad.net/bugs/1654392 Title: growisofs -speed parameter has no effect Status in dvd+rw-tools package in Ubuntu: New Bug description: growisofs apparently ignores the -speed parameter when burning a DVD ISO regardless of the given value or the supported writing speeds. ——— $ dvd+rw-mediainfo /dev/dvd INQUIRY: [HP ][DVD Writer 1270d][GH24] GET [CURRENT] CONFIGURATION: Mounted Media: 1Bh, DVD+R Media ID: MBIPG101/R05 Current Write Speed: 16.0x1385=22160KB/s Write Speed #0: 16.0x1385=22160KB/s Write Speed #1: 12.0x1385=16620KB/s Write Speed #2: 8.0x1385=11080KB/s Write Speed #3: 6.0x1385=8310KB/s Speed Descriptor#0: 00/2295103 R@16.0x1385=22160KB/s W@16.0x1385=22160KB/s READ DVD STRUCTURE[#0h]: Media Book Type: 00h, DVD-ROM book [revision 0] Legacy lead-out at: 2295104*2KB=4700372992 READ DISC INFORMATION: Disc status: blank Number of Sessions: 1 State of Last Session: empty "Next" Track: 1 Number of Tracks: 1 READ TRACK INFORMATION[#1]: Track State: blank Track Start Address: 0*2KB Next Writable Address: 0*2KB Free Blocks: 2295104*2KB Track Size: 2295104*2KB ROM Compatibility LBA: 270336 READ CAPACITY: 0*2048=0 $ growisofs -speed 12 -dvd-compat -Z /dev/dvd=dvd1.iso Executing 'builtin_dd if=dvd1.iso of=/dev/dvd obs=32k seek=0' /dev/dvd: "Current Write Speed" is 16.4x1352KBps. 0/4621449216 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0% 0/4621449216 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0% […] 4328620032/4621449216 (93.7%) @15.6x, remaining 0:20 RBU 100.0% UBU 99.3% 4393402368/4621449216 (95.1%) @14.0x, remaining 0:16 RBU 100.0% UBU 99.3% 4466507776/4621449216 (96.6%) @15.8x, remaining 0:10 RBU 100.0% UBU 99.0% 4527161344/4621449216 (98.0%) @13.1x, remaining 0:06 RBU 100.0% UBU 15.4% 4601151488/4621449216 (99.6%) @16.0x, remaining 0:01 RBU 60.5% UBU 99.0% builtin_dd: 2256576*2KB out @ average 10.4x1352KBps /dev/dvd: flushing cache /dev/dvd: closing track /dev/dvd: closing disc /dev/dvd: reloading tray ——— Same result with -speed=8 or -speed 8: Instead of using the specified speed (listed as supported by dvd+rw-mediainfo), it uses 16x instead. With the same media and drive, setting speed *does* when using wodim (e.g., `wodim -v -dao speed=8 dvd1.iso` does write at 8x), so it isn't simply a drive/media issue. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: growisofs 7.1-11 ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21 Uname: Linux 4.4.0-43-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 Date: Thu Jan 5 14:31:16 2017 Dependencies: gcc-5-base 5.4.0-6ubuntu1~16.04.4 gcc-6-base 6.0.1-0ubuntu1 libc6 2.23-0ubuntu4 libgcc1 1:6.0.1-0ubuntu1 libstdc++6 5.4.0-6ubuntu1~16.04.4 InstallationDate: Installed on 2016-04-11 (268 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) SourcePackage: dvd+rw-tools UpgradeStatus: Upgraded to xenial on 2016-04-26 (254 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dvd+rw-tools/+bug/1654392/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
